Albert Glover, star third baseman with the Blue Jays, is given a choice of three contracts:

(a) 3, 200, 000 per year for the next 5 years, payable at the end of each year.

(b) 3, 000, 000 per year for the next 5 years, payable at the beginning of each year.

(c) 1, 800, 000 per year for the next 10 years, payable at the end of each year.

Find the range of interest rates for which each of the contracts has a higher present value then the other two