a. Verify of all the prices and quantities calculated in the discussion.
b. Now assume that intermediaries come from a competitive market with an equilibrium price of $8 per unit for their services, that is, any buyer or seller who wants an intermediary's services must pay $8 for them. What is the maximum per unit that sellers are willing to pay intermediaries if hiring them saves buyers $8 in transaction costs?
c. Does your answer to Question 16a change if buyers pay $8 per unit to the intermediary but sellers offer to rebate part of that expense to buyers?