Economists observed the only five residents of a very small economy and estimated each one€™s consumer spending at various levels of current disposable income. The accompanying table shows each resident€™s consumer spending at three income levels.

a. What is each resident€™s consumption function? What is the marginal propensity to consume for each resident?

b. What is the economy€™s aggregate consumption function? What is the marginal propensity to consume for the economy?

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Individual current disposable income Individual consumer $0 $20,000 $40,000 spending by $1,000 $15,000 $29,000 Andre Barbara 2,500 12,500 22,500 Casey 2,000 20,000 38,000 Declan 29,000 5,000 17,000 Elena 34,000 4,000 19,000