Group 1: You won $5,000,000 in the Massachusetts Lottery's Halloween Bonanza game. It pays out 10 years from now. How much is it worth today?

Group 2: You won a similar prize, but it pays out $500,0000/yr for the next 10 years.

Group 3: You won a prize that pays out $600,000/yr for the next 15 years.

Groups, what is your prize worth today assuming a 2% interest rate? Which prize would you rather receive assuming it is taxable at a 55% tax rate? Please explain your answer with all calculations.