You are considering auctioning a Leonardo Da Vinci original sketch. You entice four bidders to come to your auction. The bidders' valuations of the sketch in decreasing order are $3.0, $2.2, $2.0, and $1.5 (in millions). Suppose that you could entice additional bidders to attend your auction. However, none of the new bidders would have a valuation greater than $3.0 million. Despite that fact, you expect the amount that the winning bidder must pay to increase regardless of the type of auction you use (first- or second-price sealed bid). For each auction, explain why you would expect the auction price to increase. If you want, you may assume the valuations of the original four participants are $3.0, $2.2, $2.0 and $1.5 million.