please answer all four parts

You will be paying $10,400 a year in tuition expenses at the end of the next two years. Bonds currently yield 6%. a. What is the present value and duration of your obligation? b. What maturity zero-coupon bond would immunize your obligation? c. Suppose you buy a zero-coupon bond with value and duration equal to your obligation. Now suppose that rates immediately increase to 7%. What happens to your net position, that is, to the difference between the value of the bond and that of your tuition obligation? d. What if rates fall immediately to 5% ? Complete this question by entering your answers in the tabs below. What is the present value and duration of your obligation? (Do not round intermediate calculations. Round "present value" to 2 decimal places and "Duration" to 4 decimai places.)