please explain how to solve part A. and breakdown formulas used. thanks

A. In the space provided below, calculate the price of 3 year note with a par value equal to $2000 and annual coupon payments equal to $70 if the interest rate is equal to 4 percent. Show how you calculate this value! B. Holding everything else constant, there exists: (a) a direct relationship (b) an indirect relationship between the present value and the waiting period for the payment