3. Investment problems: a. For her retirement, Rose plans to invest $6,000 each year for 10 years. Calculate how much she will have when she retires if she earns 8.5% per year. b. Assuming instead Rose invests $6,000 each year for 30 years, calculate how much she will have when she retires if she earns 8.5% per year. e. Assuming instead Rose invests $6,000 each year for 40 years, calculate how much she will have when she retires if she earns 8.5% per year. d. Assuming Rose invests $89,000 today and expects to earn 8.5% per year, calculate how much she will expect to have in 30 years. e. From Question d, calculate how much she will expect to have in 30 years if interest is compounded monthly