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Exercise 4. [8] A loan is being repaid with 10 payments of 300 followed by 20 payments of 500 at the end of each year. The effective annual rate of interest is 5% for the first 10 years and 6% thereafter. 1) Calculate the amount of the loan. 2) Calculate the outstanding loan balance immediately after the 5-th payment has been made. 3) Calculate the outstanding loan balance immediately after the 15-th payment has been made. 4) Calculate the amounts of interest and principal paid in the 16-th payment. 5) We suppose that after 15 payments, the borrower request for the installments to be stopped for 1 year. a) Calculate the revised installment when the borrower starts to pay back again, so that the loan period remains unchanged. b) What is the difference in the interest paid due to the temporary stoppage of installments