In. GRAPH Surplus Measures Off SETTINGS Rese ($) Price Tax imposed on: Supply Demand 90 $90.00 80 Excise Tax (0 - $20) 0.00 70 Demand 60 Perfectly Relatively 50 Inelastic Elastic $50.00 Relatively Elastic 40 Supply 30 Less Perfectly 20 Elastic Elastic Perfectly Elastic 10 CALCULATIONS 0 1.0 2.0 3.0 4.0 5.0 6.0 9.0 Quantity (thousands per week) Price Paid Quantity No Tax $50.00 4,000 With Tax $50.00 4,000 Instructions: Reset the diagram to the initial settings. Set demand relatively elastic such that the vertical Intercept is $90, supply Is perfectly elastic, and there is no excise tax (set to $0). Use the Surplus Measures switch above the graph as needed. a. What is the equilibrium price? $ 50.00 b. What Is the equilibrium quantity? | 4000 units c. Who has economic surplus in this situation? | Consumers only d. What is the total amount of the economic surplus