There are four questions.(part B,C,D,E) It needs some Matlab skills to solve those questions. I don't know how many words would be. Please see the attached file. Thanks.

Questions
Data_ALL
        mcaldt    mretGE    mretJNJ    mretKO    mretNKE    mretXOM    risk-free
        31 Jan 00    -0.1365105    -0.0770777    -0.0139485    -0.0819672    0.0356866    0.0012414877
        29 Feb 00    -0.0093545    -0.1601452    -0.1534276    -0.375    -0.0921049    0.0012414877
        31 Mar 00    0.1787347    -0.0243056    -0.0312082    0.3976264    0.0348548    0.0012414877
        28 Apr 00    0.0104418    0.1743772    0.0066578    0.0962145    -0.0032077    0.0012414877
        31 May 00    0.0051669    0.0887273    0.1296296    -0.0129496    0.0780692    0.0012414877
        30 Jun 00    0.0059312    0.1382682    0.0792974    -0.0686297    -0.0577644    0.0012414877
        31 Jul 00    -0.0269025    -0.0865031    0.0674646    0.0989011    0.0191083    0.0012414877
        31 Aug 00    0.1409478    -0.0086501    -0.1416921    -0.0957143    0.0258125    0.0012414877
        29 Sep 00    -0.0147106    0.0217539    0.0507363    0.0156714    0.0918836    0.0012414877
        31 Oct 00    -0.0498375    -0.0192947    0.0952381    -0.0031201    0.0007013    0.0012414877
        30 Nov 00    -0.0957811    0.0889552    0.0400828    0.0672926    -0.0083812    0.0012414877
        29 Dec 00    -0.0295586    0.050625    -0.0269461    0.3121994    -0.0120739    0.0012414877
        31 Jan 01    -0.0408344    -0.1135753    -0.0482051    -0.0141993    -0.0320632    0.0012414877
        28 Feb 01    0.0113093    0.0485344    -0.0856897    -0.2902581    -0.0316102    0.0012414877
        30 Mar 01    -0.0963441    -0.1013048    -0.1450122    0.0414853    -0.0006169    0.0012414877
        30 Apr 01    0.1593406    0.1030068    0.0228078    0.0310728    0.0938271    0.0012414877
        31 May 01    0.0096848    0.0086028    0.0261962    -0.0169817    0.0066592    0.0012414877
        29 Jun 01    -0.005102    0.0314595    -0.0468355    0.0245743    -0.0155493    0.0012414877
        31 Jul 01    -0.1044103    0.082    -0.0088889    0.1324124    -0.0438466    0.0012414877
        31 Aug 01    -0.057931    -0.022366    0.0912556    0.0515247    -0.0330459    0.0012414877
        28 Sep 01    -0.0883357    0.051034    -0.0336963    -0.0614    -0.01868    0.0012414877
        31 Oct 01    -0.0212366    0.0453068    0.0219851    0.0544755    0.001269    0.0012414877
        30 Nov 01    0.0574018    0.0089795    -0.0154553    0.0735414    -0.0461343    0.0012414877
        31 Dec 01    0.0457143    0.0145922    0.004046    0.0635969    0.0508021    0.0012414877
        31 Jan 02    -0.0731038    -0.0269036    -0.0721103    0.065256    -0.0063613    0.0012414877
        28 Feb 02    0.0411843    0.0620762    0.0832    -0.0175263    0.0635083    0.0012414877
        28 Mar 02    -0.0272727    0.0665024    0.1069846    0.0215766    0.0612591    0.0012414877
        30 Apr 02    -0.1575434    -0.0167821    0.0621891    -0.1113147    -0.0835045    0.0012414877
        31 May 02    -0.0129952    -0.0360946    0.0009008    0.0078755    -0.0002489    0.0012414877
        28 Jun 02    -0.0613359    -0.1481663    0.0115191    0.0003721    0.0247933    0.0012414877
        31 Jul 02    0.1084338    0.01416    -0.1082143    -0.0812675    -0.1016618    0.0012414877
        30 Aug 02    -0.0636646    0.0285849    0.0212255    -0.1239602    -0.0293797    0.0012414877
        30 Sep 02    -0.1764511    -0.0042349    -0.0556863    0.0027791    -0.1001411    0.0012414877
        31 Oct 02    0.0243408    0.0863535    -0.030859    0.092867    0.0551724    0.0012414877
        29 Nov 02    0.0740594    -0.0259574    -0.0137694    -0.0510701    0.0407011    0.0012414877
        31 Dec 02    -0.0951328    -0.0580498    -0.0394391    -0.0037963    0.004023    0.0012414877
        31 Jan 03    -0.049692    -0.0018618    -0.0770986    0.0015741    -0.0226101    0.0012414877
        28 Feb 03    0.0475367    -0.0178138    -0.0059317    0.0410866    0.0029282    0.0012414877
        31 Mar 03    0.0602911    0.1033365    0.0119343    0.1119258    0.0273369    0.0012414877
        30 Apr 03    0.154902    -0.0260929    -0.0019762    0.0410346    0.0071531    0.0012414877
        30 May 03    -0.0254669    -0.0314053    0.1279702    0.0459556    0.0411932    0.0012414877
        30 Jun 03    0.0059233    -0.048758    0.0232609    -0.0421504    -0.0134616    0.0012414877
        31 Jul 03    -0.0083682    0.0017408    -0.0310278    -0.0327164    -0.0091896    0.0012414877
        29 Aug 03    0.0397327    -0.0380382    -0.0322437    0.1012756    0.0666104    0.0012414877
        30 Sep 03    0.0145418    -0.0012102    -0.0078125    0.0698491    -0.0291778    0.0012414877
        31 Oct 03    -0.0268366    0.0163571    0.0800745    0.0506413    -0.0005464    0.0012414877
        28 Nov 03    -0.0117201    -0.0156965    0.0068965    0.0524256    -0.0035539    0.0012414877
        31 Dec 03    0.0875479    0.0478702    0.0913979    0.0209665    0.1325967    0.0012414877
        30 Jan 04    0.0855391    0.0340689    -0.0297537    0.0175286    -0.0051219    0.0012414877
        27 Feb 04    -0.0270592    0.0136653    0.0146222    0.051536    0.0399607    0.0012414877
        31 Mar 04    -0.0615006    -0.0591727    0.0118095    0.0658021    -0.0137538    0.0012414877
        30 Apr 04    -0.0186763    0.0652602    0.0053678    -0.0760242    0.0230825    0.0012414877
        28 May 04    0.0390651    0.0363687    0.0154241    -0.0111188    0.0227967    0.0012414877
        30 Jun 04    0.0475579    -0.0001795    -0.012074    0.0674631    0.0268208    0.0012414877
        30 Jul 04    0.0262345    -0.0077199    -0.131141    -0.040132    0.042558    0.0012414877
        31 Aug 04    -0.0138346    0.0563597    0.0193798    0.0357585    0.0015119    0.0012414877
        30 Sep 04    0.0301922    -0.0304647    -0.0986357    0.0489976    0.0483732    0.0012414877
        29 Oct 04    0.0160809    0.0363927    0.015231    0.0318527    0.0184151    0.0012414877
        30 Nov 04    0.0363424    0.0381123    -0.0270536    0.0412004    0.0467289    0.0012414877
        31 Dec 04    0.0384615    0.0513925    0.0592724    0.0741791    0.0001951    0.0012414877
        31 Jan 05    -0.010137    0.0201829    -0.0036023    -0.0447679    0.0066329    0.0012414877
        28 Feb 05    -0.0196513    0.0183153    0.0315738    0.0036939    0.2321706    0.0012414877
        31 Mar 05    0.0244318    0.0237806    -0.0198598    -0.0389879    -0.0586006    0.0012414877
        29 Apr 05    0.0038824    0.0218879    0.0424766    -0.0780218    -0.0431208    0.0012414877
        31 May 05    0.0077348    -0.017485    0.0273942    0.0701732    -0.0094687    0.0012414877
        30 Jun 05    -0.0441337    -0.0312966    -0.0582568    0.0565694    0.0225979    0.0012414877
        29 Jul 05    -0.004329    -0.016    0.0481437    -0.0323325    0.0222725    0.0012414877
        31 Aug 05    -0.0257971    -0.0037523    0.0054845    -0.0583532    0.0245107    0.0012414877
        30 Sep...