Consider a 30 year, two step mortgage for $335,000. The initial interest rate is 5.5 percent, but the loan contract calls for a rate adjustment at the end of year 5. The new rate will be 2 percentage points above the 10-year Treasury bond yield. The interest rate is capped at 5 percentage points above the initial interest rate. If the T-bond yield is 7.5% at the time of the adjustment, what will the payments be for the last 25 years of this loan? I need the information for excel.