To solve the problem based on the given supply and demand graph, we need to calculate the consumer surplus, producer surplus, and total surplus.

Step 1: Identify the equilibrium point

The graph shows that the equilibrium quantity is 5, and the equilibrium price is $4.5. This is where the supply and demand curves intersect.

Step 2: Consumer Surplus Calculation

• Consumer surplus is the area between the demand curve and the price, up to the equilibrium quantity.
• The formula for the area of a triangle is: $\text{Area of triangle} = \frac{1}{2} \times \text{base} \times \text{height}$
• In this case, the height is the difference between the maximum price on the demand curve ($9) and the equilibrium price ($4.5): [ \text{Height} = 9