4. Suppose you are getting a loan of $40,000 today which you plan to pay off in 15 years with an annual fixed payment and your interest rate is 5%. How much annual fixed payment do you have to pay? Just write the formula (application of the basic present value formula) you will use to calculate the market price with these numbers. No need to calculate the actual answer. (No credit for formula that with just n,I,r etc. and the one used for a financial calculator)