1a) What is the monthly mortgage payment for a mortgage loan (20m) of 30 years that charges 4% fixed mortgage rate? 1b) Suppose you plan to fully pay off the above mortgage loan right after you have made repayments for 8 years. What is the loan balance? 2) Suppose you want to borrow $10m from Bank A for a commercial property and you can make two balloon payments of $1m each in the 60th and 120th months. The fixed interest rate is 6% for this 10 years mortgage. What is the monthly payment