A couple buys a 2-bedroom condo for $758,000 by paying $300,000 down and then taking out a mortgage for the balance. The mortgage is to be amortized with monthly payments (rounded to the nearest cent) over a 25 year period. Bank #1 lends money at a nominal interest rate of 6.3% convertible quarterly and this rate is guaranteed for 5 years. Bank #1 allows the couple to make additional mortgage payments without penalty. Bank #2 lends money at a nominal interest rate of 6.2% convertible quarterly and this rate is guaranteed for 5 years. Bank #2 allows the couple to make additional mortgage payment but charges a penalty each time an additional payment is made. The penalty is added to the mortgage balance immediately after the additional payment is made and is equal to 5 months' interest on the amount of the additional payment (where interest is calculated at a nominal interest rate of 6.2% convertible quarterly). Suppose the couple has a savings account that earns a nominal interest rate of 3.5% convertible monthly. If the couple plans to double their mortgage payment at the end of every quarter year, which bank should they borrow money from?