Calculate the expected payoff for the following cases,where q1 and q2 are the probabilities of state 1 and 2,respectively. 
Definitions:
Market Equilibrium
The state in which market supply and demand balance each other, resulting in stable prices.
Social Value
The importance or worth of something in terms of its contribution to society or the community.
Private Value
The value of a good or service to an individual rather than to society as a whole or to the market.
Externality
A cost or benefit arising from an activity or transaction that affects an unrelated third party who did not choose to incur that cost or benefit.
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