I did not understand the previous explanation for this exercise. Please help!

2. Supply and demand exercise: For each exercise you must draw a graph with the supply and demand curves. The following table presents the supply and demand plans for lobster. a. Draw a graph of the lobster market and identify the equilibrium point (price and quantity). b. Suppose the price of lobster is $20 per pound. Describe the market situation and explain how the price adjusts. c. Suppose the price of lobster is $8 per pound. Describe the market situation and explain how the price adjusts. d. If a company polluted the waters from which lobsters are obtained, and as a result the quantities change by 200 pounds at each price level, determine the market price and the quantity available on the market. Quantity demanded Quantity offered