Five years ago, Diane secured a bank loan of $300,00 to help finance the purchase of a loft in the San Francisco Bay Area. The term of the mortgage was 30 years, and the interest rate was 6%/year compounded monthly on the unpaid balance. Because the interest for a conventional 30-year home mortgage has dropped to 4.5%/year compounded monthly, Diane is thinking of her property. A. What is Diane's current monthly mortgage payment? B. What is Diane's current outstanding principle? C. If Diane decides to refinance her property by securing a 30-year home mortgage loan in the amount of the current outstanding principle at the prevailing interest rate of 4.5%/ year compounded monthly, what will be her monthly mortgage payment. D. How much less would Diane's monthly payment be if she refinances ?