Annual Demand and Supply for the Entronics Company Is Given

Essay

Annual demand and supply for the Entronics company is given by:
Q_D = 5,000 + 0.5 I + 0.2 A - 100P,and Q_S = -5000 + 100P
where Q is the quantity per year,P is price,I is income per household,and A is advertising expenditure.
a.If A = $10,000 and I = $25,000,what is the demand curve?
b.Given the demand curve in part a.,what is equilibrium price and quantity?
c.If consumer incomes increase to $30,000,what will be the impact on equilibrium price and quantity?