Suppose that your original mortgage is a 30-year loan for $150,000 at 7.5% annual interest compounded monthly. Three years after taking out the original loan, you have an opportunity to refinance and take out a new loan at a 6% annual interest rate compounded monthly. There is an up-front refinancing cost of $1,500 (closing costs) plus 2% of the outstanding balance of the old loan. a) Calculate the monthly payment on the original mortgage ($150,000 for 30 years at 7.5% annual rate compounded monthly). b) Calculate the outstanding balance on the original loan after making 36 monthly payments of (a) each. c) Calculate the monthly payments if you take out a new loan on the balance computed in (b) for 27 years at a 6% annual interest rate compounded monthly)