Jimmy deposits $4,000 now, $2,500 3 years from now, and $5,000 6 years from now. Interest is 5% for the first 3 years and 7% for the last 3 years. a) How much money will be in the fund at the end of 6 years? b) What is the present worth of the fund? c) What is the uniform series equivalent of the fund (uniform cash flow at end of yours 1 through 6)?