a$.$ Compute the future value of $$2,000$ compounded annually for $20$ years at $4$ percent. $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ Compute the future value of $$2,000$ compounded annually for $15$ years at $10$ percent. $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ Compute the future value of $$2,000$ compounded annually for $25$ years at $4$ percent $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

a$.$ Future value

b$.$ Future value

c$.$ Future value