4. A deposit of 100 is made into a fund at time t = 0, The fund pays interest at a nominal rate of discount d compounded monthly for the first two years. Beginning at time t-2, interest is credited at a force of interest ,-,01. At timet 5, the accumulated valued of the fund is 150. Calculate d (A) 18.6% (B) 18.9% (C) 19.2% (D) 19.5% (E) 19.8% 4. A deposit of 100 is made into a fund at time t = 0, The fund pays interest at a nominal rate of discount d compounded monthly for the first two years. Beginning at time t-2, interest is credited at a force of interest ,-,01. At timet 5, the accumulated valued of the fund is 150. Calculate d (A) 18.6% (B) 18.9% (C) 19.2% (D) 19.5% (E) 19.8%