3. Relative to charging an entry fee and setting marginal price equal to marginal cost, using a two-part tariff may the market's efficiency because a. increase; fewer units are sold inefficiently b. decrease; all relevant customers would have purchased entry without the tariff c. decrease; it moves surplus from the consumer to the producer d. any of the above 4. A bike shop sells a bike for $1,000, a bike accessory for $100, or the bike with the accessory for $1,050. This is an example of: a. First degree price discrimination b. Third degree price discrimination c. Tricking customers into paying more than they desire the good d. Mixed Bundling