Problem 3: Find the present value of the amount each annuity in each of the following problem. Page 1 MATHEMATICS IN THE MODERN WORLD 1. Php 7.500 payable at the end of each month for 10 years if money is invested at 5% compounded monthly. 2. Php 10,000 payable at the end of each 6 months for 5 years if money is invested at 8% compounded semiannually. Problem 4: Read the question and solve the problem below. Write your complete solution. Mike Marquez purchased a lawn tractor for Php 9,000. He made a down payment of Php 1.000 and financed the rest at 7% payable in 24 months. He paid off the loan at the end of the fifteenth months. Find the amount of his refund using the rule of 78s