Dylan purchased a house for $325,000. He made a down payment of 10.00% of the value of the house and received a mortgage for the rest of the amount at 4.22% compounded semi-annually amortized over 25 years. The interest rate was fixed for a 4 year period.

a.Calculate the monthly payment amount.

b.Calculate the principal balance at the end of the 4 year term.

c.Calculate the monthly payment amount if the mortgage was renewed for another 4 years at 5.72% compounded semi-annually?