The yield to maturity on two $10-$year maturity bonds currently is $7\%.$ Each bond has a call price of $$1,100.$ One bond has a coupon rate of $6\%,$ the other $8\%.$ Assume for simplicity that bonds are called as soon as the present value of their remaining payments exceeds their call price. What will be the capital gain on each bond if the market interest rate suddenly falls to $6\%?$ Show me the calculations!