1) In the process of repaying a loan by the method of progressive amortization in annual installments, during the 6th year the amortization is 101,470.23, the interest is 20,034.35 and the balance to be repaid is 560,687.01. Required to calculate: a) The amount of the loan, b) the interest rate of the loan and, c) the duration of the loan.

2) A company wants to buy mechanical equipment worth 2,000,000. In order to make the purchase, the lump sum repayment of the amount was agreed after 8 years with an annual interest rate of 12%. Required to calculate: a) Interest when paid at the end of each year and b) the repayment deposit if the interest when paid at the end of each year.