Fifteen years ago deposited 12500 in to an investment fund.five years ago you added an additional $20000 to that account.you earn 8% compound semi annually for the first ten years,and 6.5% compound...

Fifteen years ago deposited 12500 in to an investment fund.five years ago you added an additional $20000 to that account.you earn 8% compound semi annually for the first ten years,and 6.5% compound annually for the last five years.

a)what is the effective interest rate(EAR) you would get for your investment in the first 10yeras?

b)how much money do you have in your account today?

c)if you wish to have $8500now,how much should you have invested 15uears a go?