1. I purchased an antique slot machine 10 years ago for $250. I just found out that I can sell it for $500. This seems like a really good gain, but I am wondering what return (Interest rate) per yer I got with this investment. 2. My grandmother just offered to give me $1000 when I graduate in three years or $5000 when I graduate from medical school in 10 years. If I can invest money at a rate of 8%/year which would I prefer? 3. What is the equivalent net future value (at the end of the five years) of the following cash flows at 10%? 50 40 30 0 3 4 5 10 20 30 4. What is the equivalent Net Present Value for the cash flow in problem 3 at 10%? 5. How much money will you have in 50 years if you invest $5000 today and earn 10% per year interest? 6. Would you prefer to invest $500 in the bank and earn 5% or invest $500 in stock and receive $700 in 5 years? 7. How long will it take you to double your money if you invest it at 8%