please both parts

Question 3 a) What's the present value of a $700 annuity payment over six years if interest rates are 10 percent? marks) (5 b) You are looking to buy a car. You can afford $450 in monthly payments for four years. In addition to the loan, you can make a $1,000 down payment. If annual interest rates are 5 percent, calculate the price which you can afford to pay for a car