Nasa would like to invest in UK government bonds, she leming how to do valuation bond in her finance class. There are two different type of bonds $($A & B$)$ to chose from: both bond will earn coupon of ure, annually $-$ paid semiannually, both bond also has $10\%$ amul discount rate. Bont $"$A$"$ does not mature, bond $"$B$"$ will mature in $20$ years. How much should Nada pay for each bond?