Can you please help how do you get to those answers and how do you in put them in excel formula?

1. You have the opportunity to make a $180,000 investment that will pay you a fixed amount monthly for 25 years. Each payment will consist of interest and principal repayment. Your required rate of return is 8%. What payment amount will you accept? PMT = $1,389.27 2. Calculate the mortgage payments for a $180,000 level payment mortgage loan amortized for 25 years at 8% interest if the payments are made annually. PMT = $16,862.18 3. How much of the first year's payment would be principal and how much would be interest? Int - $14,400 Prin = $2,462.18 4. If the mortgage is for 25 years with monthly amortization, what are the monthly payments? PMT - $1 389.27 Focus