5) Mara Padro wants to have $65,000 in 15 years, to use for her son's college education. How much should you invest today if the interest rate is 10% ? 6) Jos Ros has acquired public liability insurance, of which he pays $3,800, at the beginning of each year, with a rate of 4%. How much will he have paid after 5 years? 7) Irma Rodrguez is going to deposit $3,500 at the end of each year, for 9 years, at 8% per year. What is the present value of this transaction