Present value of an annuity

Find the present values of these ordinary annuities. Discounting occurs once a year. Round your answers to the nearest cent.

$600 per year for 12 years at 10%.

$300 per year for 6 years at 5%.

$1,000 per year for 8 years at 0%.

Rework previous parts assuming that they are annuities due. Round your answers to the nearest cent.

$600 per year for 12 years at 10%.

$300 per year for 6 years at 5%.

$1,000 per year for 8 years at 0%.