7. Two employees of a real estate company prepare bids for the purchase of land. Offer A is for an immediate cash purchase of $100,000. Offer B is for $30,000 cash down payment and the purchase of an annuity with an annual rate of 8% compounded quarterly yielding payments of $4200 to be paid quarterly on behalf of the company for 5 years. (a) Determine which offer requires the lesser amount of money, and (b) find the difference between the cash values of the two offers. (a) Which offer requires the lesser amount of money? Offer A Offer B (b) The difference in cash involved is approximately $ (Round to the nearest cent as needed.)