3. The Morgan Co has two different bonds currently outstanding. Bond A has a face value of $1000 and mature in 3 years. The bond pays $80 each year. Bond B has a face value of $800 but mature in 5 years, and the bond pays $60 each year. Currently, the market prices of bond A and bond B are $ 1020 and $ 860, respectively. If the return rate on similar-risk bonds is 6%, which bond is worth to be invested, bond A or bond B or both of them