Suppose you've started planning your retirement and you want to live in retirement only on your investment earnings. During retirement you want to earn $50,000 per year before taxes and you figure your investments during retirment will earn 5 percent per year. You save $40,000 per year for the next 10 years until you retire. While saving you expect your portfolio to earn 9.2 percent per year, compounded annually. How much money must you save in order to earn $50,000 during retirement? **Please show all work**