ASD Co. issued an 8% coupon (paid annually) 20-year bond 20 years ago (t=0). The company originally issued the bond at par. For the first five years after the issue, the interest rate remained the same as that at the issue date. For the next five years, the appropriate interest rate was 7%. In the subsequent five years the interest rate rose to 11%, and in the last five years of the bond, the interest rates were at 9%. Compute the price of the bond at (a) t=4, (b) t=6, (c) t=14, (d) t=17, and (e) t=19

I'm using a financial calculator. Can't use Excel in my class.