9. Bond A is a zero coupon bond with a face value of 1,000 yuan and a maturity of 1 year, and the market price is 909.09 yuan; bond B is a zero coupon bond with a face value of 1,000 yuan and a maturity of 3 years, and the market price It is 816.30 yuan. a) the 1-year spot rate; b)the 3-year spot rate; c)What is the forward rate f 13