Mark Harris must decide how to invest $20,000 that he just inherited. What would be the future value of his investment after 7 years under each of the following three investment opportunities? (If you solve this problem with algebra round intermediate calculations to 6 decimal places, in all cases round your final answer to the nearest penny.) a. 6.48 percent compounded quarterly.

Value of investment after 7 years

$

b. 6.00 percent compounded monthly.

Value of investment after 7 years

$

c. 6.23 percent compounded continuously.