As a result of a slowdown in operations, Mercantile Stores is offering to employees who have been terminated a severance package of $150,000 cash, another $150,000 to be paid in one year, and an annuity of $35,000 to be paid each year for 20 years. Use Excel to compute the present value of the complete package, assuming an interest rate of 7 percent. compute present values of both packages