a. Assume the interest rate in the market (yield to maturity) goes down to 8 percent for the 10 percent bonds. Using column 2, indicate what the bond price will be with a 10 -year, a 20 -year, and a 25 -year time period. b. Assume the interest rate in the market (yield to maturity) goes up to 12 percent for the 10 percent bonds. Using column 3 , indicate what the bond price will be with a 10 -year, a 20 -year, and a 25 -year period