6. Amelia decides to purchase a $415,000 house. She wants to finance 90% of the balance and she has already saved enough to put 10% down. She has a mortgage APR of 5.75% for a 15 -year mortgage. a.) What is her monthly payment? b.) What is her total cost if she takes all 15 years to pay off the house? c.) Over the course of the loan, how much interest will she pay? d.) If the loan was changed to 30 years instead of 15 years and the APR stayed the same (in re al life it doesn't), what would her monthly payment be