Bidding strategy

Your company is bidding for a broadband spectrum license. You have been asked to
submit an optimal bidding strategy. You expect that bidders will have independent
private values for the licenses because each bidder presently has a different structure in
place. You elieve the valuations for these licenses will be $200 million and $700 million.
Your own valuation is $650 million. There is some uncertainty about the auction design
that will be used, so you must suggest an optimal bidding strategy for the following
acution designs:
a. Second-price, sealed-bid auction
b. English auction.
c. Dutch auction