Please solve.

A $1,000 bond with a coupon rate of 5.1% paid semiannually has two years to maturity and a yield to maturity of 6.7%. If interest rates fall and the yield to maturity decreases by 0.8%, what will happen to the price of the bond? A. fall by $17.52 B. rise by $20.44 C. rise by $14.6 D. fall by $14.6 A risk-free, zero-coupon bond with a $5,000 face value has 20 years to maturity. The bond currently trades at $3,740. What is the yield to maturity of this bond? A. 1.462% B. 0.731% C. 62.6% D. 74.8% Consider the following two projects: The payback period for project B is closest to: A. 1.8 years B. 1.5 years C. 2 years D. 1.6 years