6-19 Interest Rate Risk [LO 2] Both Bond Sam and Bond Dave have 10.2 percent coupons, make semiannual payments, and are priced at par value. Bond Sam has 4 years to maturity, whereas Bond Dave has 21 years to maturity. Both bonds have a par valtue of 1,000 . a. If interest rates suddenly rise by 2 percent, what is the percentage change in the price of these bonds? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16. b. If rates were to suddenly fall by 2 percent instead, what would be the percentage change in the price