1. Suppose you are 30 years old today and your salary next year will be $100,000 per year until your retirement at the age of 60. If you save 5% of your salary at the end of every year (31-60) and invest at 8% per year, how much can you withdraw from the account each year from age 61 to age 80 (20 years) to fund your retirement activities? R_{sim substitute} = 8%.