Assume that coupon interest payments are made semiannually and that par value is $1,000 for both bonds. Required: a. Calculate the values of Bond A and Bond B. (Enter all values as positive value. Do not round intermediate calculations. Round your answers to 2 decimal places.) b. Recalculate the bonds' values if the required rate of return changes to 770%. (Enter all values as positive value. Do not round Intermediate calculations. Round your answers to 2 decimal places.) c. Calculate the increase or decrease in bond value based on the change in required return. (Enter all values as positive value. Do not round intermediate calculations. Round your answers to 2 decimal places.)