Total surplus in the market.

Step 1: To determine the total surplus in the market. Step 2: Explanation: - Figure 1 illustrates the equilibrium, surplus, and shortage in the market that is caused by different price levels. - The horizontal axis measures the quantity and the vertical axis measures the price. - The curves D and S represent the demand and the supply, respectively. - The market is in equilibrium at the point where the demand curve intersects the supply curve. - Option (b): At the price of $5, the market demand is 2,000 units and the market supply is 12,000...