What is the present value of a $650 perpetuity discounted back to the present at 12%? What is the present value of the perpetuity?

What is the present value of a perpetual stream of cash flows that pays $80,000 at the end of one year and grows at a rate of 7% indefinitely? The rate of interest used to discount the cash flows is 9%. What is the present value of the growing perpetuity?

How much do you have to deposit today so that beginning 11 years from now, you can withdraw $9,000 a year for the next eight years (periods 11 through 18) plus an additional amount of $18,000 in the last year (period 18)? Assume an interest rate of 8%. What is the amount of money you would need to deposit today?