In the retirement example, suppose that t = 30, s = 20, and r = .12. Find the payment amount P for withdrawals Q of $3000 per month. If inflation is running at 2% per year, what value of P will give...

In the retirement example, suppose that t = 30, s = 20, and r = .12. Find the payment amount P for withdrawals Q of $3000 per month. If inflation is running at 2% per year, what value of P will give the first withdrawal the current purchasing power of $3000? The last withdrawal?