vi) vii) (3 marks) Suppose the exogenous incomes changed so that they became (IA + 100) and (IB 100). Did aggregate income of the households change? Did the market equilibrium price and quantity change? If so, by how much? (2 marks) If we were to have a market model where the demand side was composed of 20 households of only one household type (A or B), which type of household would allow the market demand to be expressed as a function of aggregate income, 201? (6 marks) Explain this result by illustrating the effect of a change in income for each type of household (as in v)) using an indifference curve analysis for each household