need help hehe

4 An investment of x pesos is made at the end of each year for three years, at an interest rate of 9% per year compounded annually. What will be the value of the investment upon the deposit of the third payment? a C 8 3.278x 3.287x P3.728x 3.782x b d You want to save an amount of P100,000 at the end of 10 years. You are given 8% interest compounded quarterly. How much would you have to save per month in order to accumulate the sum of P100,000 ten years from now? a P348.21 "PS48.21 P448.21 P64 b