Draw a figure to illustrate the answer given in Solved Problem 5.4. Use math and a figure to show how adding an ad valorem tax changes the analysis. (See the application "Shipping the Good Stuff Away.")
Problem 5.4
Derive and plot Olivia's Engel curve for pie if she eats pie only à la mode and does not eat either pie or ice cream alone (pie and ice cream are perfect complements).