1. You have a twin brother named Bill. You share the same birthday of January 1, 2000. When you turned 19, you decide to invest $4,000 and earn 7% compound interest. You try to convince your brother Bill to do the same. He rejects your idea and plans to invest $10,000 when he turns 40 and will also earn 7% compound interest. Bill believes that he will have more money than you when you both turn 90 on January 1, 2090. Explain to Bill that no matter how long you both shall live he will never have as much money as you. Explain why.