for a $225,000 mortgage with a 3-year term and 7% interest rate compounded semi-annually, not in advance, calculate the monthly payments if the amortization period is 20 years. Compare this with a 10-year amortization period, and a 25-year amortization period. how much will the borrower owe at the end of the term of each mortgage? what will the monthly payments be? if the interest rate changes to 8%, what impact would this have if all the other variables remain constant?

please show step by step with formulas, no excel ,needs to to be hand written neatly please, and if algebra is being used can I please see how the numbers came