4. The following equation is used to compute monthly payments on a mort- gage: A = // (1 - (1 + i)-") Where A is the total mortgage amount, P is the monthly payment, i is the monthly interest rate, and n is the number of months. Suppose that a client wants an $800,000.00 mortgage to be paid in 30 years but he can pay no more than $7,000.00 each month. What is the highest monthly interest rate that he would be able to pay?