Find the future values of these ordinary annuities. Compounding occurs once a year. Do not round intermediate calculations. Round your answers to the nearest cent.

a$.$ $$400$ per year for $8$ years at $16\%.$

$

b$.$ $$200$ per year for $4$ years at $8\%.$

$

c$.$ $$900$ per year for $4$ years at $0\%.$

$

d$.$ Rework parts a$,$ b$,$ and c assuming they are annuities due.

Future value of $$400$ per year for $8$ years at $16\%$ : $

Future value of $$200$ per year for $4$ years at $8\%$ : $

Future value of $$900$ per year for $4$ years at $0\%$:$