Assume that a mortgage pool has 5 mortgages with the following characteristics: Number of Months to Maturity 67 Mortgage Outstanding Coupon Rate (%) Mortgage Balance 1 1,000,000 5.355 2 2,000,000 5.265 3 2,000,000 4.875 4 3,000,000 5.000 5 2,000,000 5.125 Total Please answer the following (2 points each, totaling 6 points): 73 48 58 42 1) What is the total size of the mortgage portfolio? 2) What is the weighted average coupon rate of the portfolio? 3) What is the weighted average maturity of the portfolio