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Suppose that an environmentally polluted area of land is cleaned up. After the clean-up, the supply of land increases from 5 acres to 7 acres. a. Using the supply-and-demand model below, show how the supply of land changes as a result of the clean-up. Instructions: Use the tool provided 'Supply2' and plot only the endpoints of the line such that the first point touches the horizontal axis Market for Land 50 Tools 45 Supply2 Land rent (dollars) 1 2 3 4 5 6 7 8 9 10 Quantity (acres of land) Instructions: Enter your answer as a whole number. b. Using your graph, after the change in supply, the total value of economic rent for all acres of land (Click to select) ] by $[