which of the auction scenarios below is best modeled as a private-cost auction? 1. electronics manufacturers bidding for a contract to supply a printed circuit board (PCB) for canon's digital cameras 2. pharmaceutical companies bidding for a national institutes of health grant to develop a cure for malaria 3. oil companies bidding for a piece of land with a potential oil reserve 4. IT solution providers bidding for a project to develop a customised cloud infrastructure for the UT system