You are given a graph with the demand curve faced by a firm, and the price that the firm currently charges. How can you find the firm's current total revenue on the graph?

Total area of the triangle under the demand curve.

Total area of the triangle that lies under the demand curve, and above the current price.

Total area of the rectangle that lies above the current price.

Total area of the rectangle that lies below the current price, and to the left of the current quantity demanded.