Refer to the graph shown. A firm that produces 900 units of output using the plant size associated with SATC2 minimizes: 1-neither long-run nor short-run average total cost. 2-long-run average total cost only. 3-both long-run and short-run average total cost. 4-short-run average total cost only. Solution at this point both long run and short run average total cost will be minimize and the correct option is 3. .