15. You have purchased a 180-day T-bill at a 5.00\% annual discount yield. 90 -days later you sell this T-bill at a 4.50% annual discount yield. What is your annualized rate of return on the purchase and sale of the T-bill cited above? 2. (3.5 points) You plan to retire in 30 years. The retirement phase of your life will last for 50 years. Your retirement spending will be modeled as end-of-year cash flows, and you forecast that your spending will consist of $90,000 per year during your retirement. So, for 30 years, you will be putting money into your retirement-savings account and for 50 years you will be withdrawing from it. Assuming a 5% year returm on this account, what equal, annual amount must you deposit into the account for the next 30 years in order to satisfy your anticipated retirement spending? Please be sure to indicate your final answer with a box around it. Also, please see the "Attention" note above