compute for each question

An entity borrowed P 5,415,401 at 5 % interest rate per annum for 15 years. Find the maturity value. Suppose you invested P 784,532 in a fund earning 10 % simple interest annually. After 2 years, you have the option of moving your money to an account that pays at an annual effective rate of 8 % compound interest. If you wish to withdraw in 8 more years, determine the net benefits of staying your money in the simple interest account Suppose that the growth of money is governed by 9 % simple interest. Find the amount needed to invest in order to have a balance of P 11,797,353 18 years from now