Now, assume you are instead given a $500,000 investment portfolio when your grandmother dies. Rather than working, you decide to invest the assets using your extensive investment knowledge gained during your time at NAU. You manage your portfolio carefully, earning a return of 8.8% each year (all long-term capital gains). a. Based on a capital gains rate of 15%, how much money will you have to live on each year (assuming you do not touch the $500,000 in principal)? b. What is your average tax rate? c. What is your marginal tax rate?