Consider the following table providing the prices for three different brands of chocolate-chip cookies during 2008 to 2009 in a particular country.(Prices are in the country's local currency. ) 
a.Compute the unweighted aggregate price index for 2009,using 2008 as the base year.
b.Interpret the result.
Definitions:
Nash Equilibrium
A concept in game theory where no player can benefit by changing strategies while the other players keep theirs unchanged; it represents a state of mutual best responses.
Simultaneous Game
A strategic interaction where all participants make decisions or moves at the same time without knowledge of the others' choices.
Best Response
In game theory, the strategy that yields the highest payoff for a player, given the strategies chosen by other players.
Simultaneous Game
A strategic game in which all players make their moves at the same time, without knowledge of the other players' actions.
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