You own a bond that pays $100 in interest annually, has a par value of $1000, ad matures in 15 years. What is the value of the bond if your required rate of return is 12%, What is the value of the bond if you required rate of return (a) increases to 15% (b) decreases to 8%? Now, recompute all three answers assuming that the bond matures in 5 years instead of 15 years