A 7.5 percent coupon bond with nine years left to maturity is priced to offer a 10.4 percent yield to maturity. You believe that in one year, the yield to maturity will be 8 percent. What is the change in price the bond will experience in dollars? (Assume interest payments are semiannual and par value is $1,000.)

I saw the answer to this problem, but I don't understand how they got the values. I need step by step instructions, please.