1. Compute the present value for the following:
   1. An investment that will pay you $1,000 in one year, another $1,000 in two years, and a third payment of $1,000 in three years (e.g., three payments of $1,000 to be paid once a year for three years). The discount rate is 4%.
   2. The same three $1,000 payments as in part a) above, but with a 6% discount rate
   3. An investment that will pay you $2,000 in one year, another $1,500 in two years, and a third payment of $3,000 in three years. The discount rate is 4%.

Please show all work for answers and explain, thank you