Melanie invested $2,200 at the beginning of every 6 months in an RRSP for 11 years. For the first 4 years it earned interest at a rate of 3.60% compounded semi-annually and for the next 7 years it earned interest at a rate of 6.30% compounded semiannually. a. Calculate the accumulated value of his investment at the end of the first 4 years