You are a bidder in an independent private values auction, and you value the object at $4,000. Each bidder perceives that valuations are uniformly distributed between $1,000 and $7,000 
 Determine your optimal bidding strategy in a first-price, sealed-bid auction when the total number of bidders (including you) is: 
 a. 2 bidders. 
 b. 10 bidders. 
 c. 100 bidders.