Today, Alpha has $5000 in his account. He expects to have $10000 in his account in 7 years. The annual interest rate that Alpha expects to earn over the next 7 years is the same as the annual interest rate he has earned since he made his initial deposit. The only deposit that Alpha has made or expects to make is the initial one that he made. How much was Alphas initial investment if he made it 2 years ago?