Suppose that the demand function of a new face cream is described by the demand function: Q(P, A) = P -1/2A 1/4 , where Q represents the quantity demanded, P represents price, and A represents...

Extracted text: Suppose that the demand function of a new face cream is described by the demand function: Q(P, A) = P -1/2A 1/4 , where Q represents the quantity demanded, P represents price, and A represents advertising expenditures. (i) Compute the price elasticity of demand (eD) and the advertising elasticity of demand (eA ). (Please show your detailed calculations).