For each problem below, write out the formula to calculate the answer and then write the answer below it. Example: You put $100 into an investment fund every year and then add another $200 at the end of year 3. If the fund provides a rate of return of 5%, how much money will be available for you to withdraw in year 5? Answer: $100(F/A, 5%, 5) + $200(F/P, 5%, 2) 3) You can buy a machine for $100,000 that will produce a net income, after operating expenses, of $10,000 per year. If you plan to keep the machine for4 years, what must the market (resale) value be at the end of 4 years to justify the investment? You must make a 15% annual return on your investment