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.

$$900$ per year for $12$ years at $12\%.$

$

$$450$ per year for $6$ years at $6\%.$

$

$$900$ per year for $6$ years at $0\%.$

$

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

Future value of $$900$ per year for $12$ years at $12\%$: $

Future value of $$450$ per year for $6$ years at $6\%$: $

Future value of $$900$ per year for $6$ years at $0\%$: $