Please provide explanations for a, b, and c. Also please show the area representing the total deadweight loss.

4.7 Use the following graph of the market for cigarettes to answer the questions. Price (dollars S2 per pack) Government tax on cigarettes S1 $5.50 4.50 4.25 0 18 20 Quantity (billions of packs per year) a. According to the graph, how much is the government tax on cigarettes? b. What price do producers receive after paying the tax? c. How much tax revenue does the government collect