$3-$P$.$ Barbara Walters proposes to sell family assets worth $$80,530$ and invest the proceeds in stocks. Walters expects the investment to pay $$800$ every month for $18$ years. What is the annual percentage rate on the investment?

$3-$Q$.$ Ms$.$ Nichols plans to save $$950$ every month for $14$ years and expects to accumulate $$328,588$ in the retirement fund by the end. What is the annual percentage rate of return on the savings?

Perpetuity Valuation

$3-$R$.$ If the discount rate is $8\mathrm{.}9\%,$ what would you be willing to pay for receiving a payment of $$600$ at the end of every year forever?