Please Answer/Explain the following:

3- CEO pay and its link to incentive compatibility and participation constraints (this is about incentives and undertanding what these constraints are) 4- A friend says to you "I don't understand why retailers offer a buy one get one free or BOGO promotion when it's no better for customers and no more profitable for stores than a half-price sale." Explain in detail whether you agree or disagree with this statement by possibly giving examples that support your arguments. 5- North American and European bricks-and-mortar retailing is increasingly becoming dominated by "hypermarts", enormous stores that sell groceries, household goods, hardware, and other products under one roof. What are the possible economies of scale that might be enjoyed by hypermarts? What are the potential diseconomies of scale? How can hypermarts fend off competition from Web-based retailing? 6-In many modern U.S. industries the following patterns seem to hold: i. Small firms are more likely to outsource production of inputs than are large firms; ii. "standard" inputs (such as a simple transistor that could be used by several elec- tronics manufacturers) are more likely to be outsourced than "tailor-made" inputs (such as a circuit board designed for a single manufacturers specific needs). What factors might explain these patterns