In the market for water bottles, market demand is P = 90 — 3QD. Two of theconsumers in this market are Leslie, who values a water bottle at 30, and Steve, who values a water bottle at 15.

The price of water bottles is at first 20, and thendrops to 10.

Graph consumer surplus before and after the change, and draw lineson the graph that represent the consumer surplus gained by Leslie and by Steve.