Jennifer deposits 1,000 into a bank account. The bank credits interest at an annual nominal rate of i convertible semi-annually for the first 7 years and an annual nominal rate of 2i convertible quarterly for all years thereafter. The accumulated amount in the account at the end of 5 years is X. The accumulated amount in the account at the end of 10.5 years is 1,980. Calculate X. A 1,200 B 1,225 1,250 D 1,275 E 1,300