$$100,000$ mortgage loan as a $25-$year emergency a calculate the monthly payment interest rate at $4\%6\%$ and $8\%$ compounded semi$-$annually B by what percentage does the monthly payment on the $8\%$ mortgage exceed the monthly payment on the $4$th percent mortgage and see calculate the total interest paid over the entire $25-$year period at each of the three interest rate assume the final payment equals the others