Marilou and Hunter both purchase milk and doughnuts at the same Quik Mart. They have different tastes for milk and doughnuts and different incomes. They both buy some milk and some doughnuts, but they buy considerably different quantities of the two goods. Can we conclude that their marginal rate of substitution between milk and doughnuts is the same? Draw a graph showing their budget constraints and indifference curves and explain.