Cassandra received a 15 year loan of $305,000 to purchase a house. The interest rate on the loan was 4.20% compounded semi-annually. a. What is the size of the monthly loan payment? $2,281.15 Round to the nearest cent b. What is the balance of the loan at the end of year 4? -4? O $241,250.91 Round to the nearest cent C. By how much will the amortization period shorten if Cassandra makes extra payment of $30,000 at the end of year 4? years ~ 1 months