Annual demand and supply for the Entronics company is given by: QD = 5,000 + 0.5 M + 0.2 A - 100P, and QS = -5000 + 100P where Q is the quantity per year, P is price, M is income per household, and A is advertising expenditure. a. What is the value of the slope parameter for the price of the good? Does it have the correct algebraic sign? Why? b. If A = $10,000 and M = $25,000, what is the demand curve? c. Given the demand curve in part b, what is equilibrium price and quantity? d. If consumer incomes increase to $30,000, what will be the impact on equilibrium price and quantity?