Instructions Answer all questions. Give your answers clearly. Do not skip intermediate steps even they are very easy and obtain the possible simplest form of the results. Complete answers with no...

Extracted text: Instructions Answer all questions. Give your answers clearly. Do not skip intermediate steps even they are very easy and obtain the possible simplest form of the results. Complete answers with no error, including expression and notation errors, receive full mark. Q1] A complex-valued function is given as in the following (z+j)(z+ 1) z2 +1 f(z) = %3D a) At which points does f(z) have discontinuity? Which discontinuities of f(z) are removable? b) Find derivative of f(z) at z=-j.