1. What is the profit-maximizing amount of water for each of the following price combinations? a) potatoes at $7.50 and water at $6.00 acre- inches. b) potatoes at $7.50 and water at $12.00 acre-inches. potatoes at $10.00 and water at $6.00 acre-inches. d) potatoes at $4.00 and water at $12.00 acre-inches. e) potatoes at $12.50 and water at $8.00 acre-inches