Calculate the future value of $2,000 in :

a) Four years at an interest rate of 7% per year.

b)Eight years at an interest rate of 7% per year.

c. Four years at an interest rate of 14% per year.

for the # question use this formula : ( FVn = C*(1+r)^n

d. Why is the amount of interest earned in part (a) less than half the amount of interest earned in part (b)?