Angela purchased a house for $350,000. She made a down payment of 25.00% of the value of the house and received a mortgage for the rest of the amount at 6.42% compounded semi-annually amortized over 15 years. The interest rate was fixed for a 6 year period. a. Calculate the monthly payment amount. Round to the nearest cent b. Calculate the principal balance at the end of the 6 year term. Round to the nearest cent