What is the future value of $7,890 at the end of 5 periods at 8% compounded interest?

What is the present value of $7,890 due 9 periods hence, discounted at 6%?

What is the future value of 16 periodic payments of $7,890 each made at the end of each period and compounded at 10%?

What is the present value of $7,890 to be received at the end of each of 19 periods, discounted at 5% compound interest?