T. Three bidders have a private valuation drawn from a uniform distribution on [0.30] for a single item. The valuations are 1D, '15 and 20 for bidders 1, 2 and 3 respectively. a) What are the bidders' equilibrium strategies in a second price auction? b) Show that for bidder2 no deviation from his strategy in a} would be protable. :3) Who wins the auction and how much do they pay? d) If instead the seller uses a rst prioe sealed bid auction, what are the bidders\" equilibrium strategies