The following table includes information for semi-annual treasuries. The coupons, yields and rates are annualized (i.e., a 2% coupon pays 1% every six months). What is the annualized spot rate for the 21/2 year treasury note? a) 0.049632 b) 0.051860 c) 0.025930 d) 0.103733 e) 0.051866