I need help with these problems

(Annuity number of periods) How long will it take to pay off a loan of $45,000 at an annual rate of 9 percent compounded monthly if you make monthly payments of $750? Use five decimal places for the monthly percentage rate in your calculations The number of years it takes to pay off the loan is years. (Round to one decimal place.) (Present value of an annuity) What is the present value of a(n) 6-year annuity that pays $1,500 annually, given a discount rate of 13 percent? The present value of the annuity is $ (Round to the nearest cent.)