Do in the easiest way possible please!

1. You are currently 18 years old. After 2 years you get $10,000 and you deposit it in an account that pays 8% interest until it becomes $50,000. How old will you be by that time? 2. You are currently 21 years old. After 5 years you get $10,000 and you deposit it in an account that pays 8% interest until it becomes $50,000. How old will you be by that time