1 part done, i need 2nd and third one

Anilka purchased a house for $400.000. She made a downpayment of 20% of the value of the house and received a mortgage for the rest of the amount at 4.90% compounded semi-annually for 20 years. The interest rate was fixed for a 5-year term. a. Calculate the size of the monthly payments. $2,017 30 Round to the nearest cent b. Calculate the principal balance at the end of the 5-year term. S0.00 une teme nascent Calculate the site of the monthly payments if after the first year term the mortgage was renewed for another year term at 425 compounded sem S0.00