Consider a 20-year $150,000 5/1 ARM having a 2.1% margin and based on the CMT index. Suppose the interest rate is initially 6% and the value of the CMT is 5.4% five years later. Assume that all interest rates use monthly compounding. (a) Calculate the monthly payment for the first 5 years. (b) Calculate the unpaid balance at the end of the first 5 years. (c) Calculate the monthly payment for the 6th year. Consider a 20-year $150,000 5/1 ARM having a 2.1% margin and based on the CMT index. Suppose the interest rate is initially 6% and the value of the CMT is 5.4% five years later. Assume that all interest rates use monthly compounding. (a) Calculate the monthly payment for the first 5 years. (b) Calculate the unpaid balance at the end of the first 5 years. (c) Calculate the monthly payment for the 6th year