1. Suppose that a consumer’s utility function for goodsx,yandzis expressed according to the Cobb–Douglas utility functionU(x,y,z) =x0.5y0.5(1 +z)0.5.Prices are given bypx= 1,py= 4, andpz= 8. Consumer income is given byI= 8.
a. Determine the utility maximising quantity of\ goodzconsumed.
b. Explain why this quantity of goodzis optimal?
c. Determine the minimum income required for the consumer to purchase productz.
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