Quarterly contributions of $1000 will be made to an RESP for 15 years. Assuming that the investments

Question:

Quarterly contributions of $1000 will be made to an RESP for 15 years. Assuming that the investments within the plan grow at 8% compounded quarterly, how much will the TFSA be worth after 15 years if the contributions are made:
a. At the end of each quarter?
b. At the beginning of each quarter?
c. By what percentage does the answer to Part (b) exceed the answer to Part (a)?