3. The demand function of a good isQ = 100 - P + 2 Y +1 / 2A where Q , P , Y and A denote quantity demanded, price, income and advertising expend-iture respectively.(a) Calculate the demand when P =...

3. The demand function of a good isQ = 100 - P + 2 Y +1 / 2A where Q , P , Y and A denote quantity demanded, price, income and advertising expend-iture respectively.(a) Calculate the demand when P = 10, Y = 40 and A = 6. Assuming that price andincome are fi xed, calculate the additional advertising expenditure needed to raisedemand to 179 units.(b) Is this good inferior or normal?I need only part B