1. How much would you have to invest now at 8% interest to have $25,000 at the end of 7 years? 2. With an 8% interest rate, how much would you have to invest at the end of each of the next 7 years to have $25,000 right after you make the last payment? 3. With an 8% interest rate, how much would you have to invest at the beginning of each of the next 7 years to have $25,000 at the end of the seventh year