Suppose a firm, RadCrete uses 3 pounds of aggregate (A), 1 pound of cement (C), and 1 gallon of water to make one block of concrete (X). PA = $0.02/lb and Pc = $0.07/1b. RadCrete has access to unlimited free water. Using a graph, sketch the firm's isoquant and isocost curves for Q = 100 units of output. Also, identify the cost-minimizing combination of A and C. On your graph, put A on the vertical axis and C on the horizontal axis. Make sure your graph is accurate and correctly labeled. You may assume that the amount of A, C, and X are continuous variables