i need help with all 4 questions, they are all connected

1. Your parents want to buy a house which costs $975,000. They are willing to put down 20% in cash and finance the rest. Wells Fargo has agreed to give them a 30-year fixed rate mortgage at 6.5% APR paid monthly. What will their monthly payment for the mortgage? 2. One year ago the same mortgage would have cost 3.5\% APR paid monthly. On the same house as the question above, how much would have been your parent's monthly payment for the mortgage? 3. Your parents shop around and a different bank is willing to lend them a $750,00030-year mortgage with payments of $4,865 per month. What is the implied APR of this loan? 4. In question 1 the bank offered a 30 -year fixed rate mortgage at 6.75% APR paid monthly. What is the equivalent annual rate (EAR)