Suppose a decrease in consumer confidence has caused aggregate demand to shift from AD to AD$1.$

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Instructions: Enter your answer as a whole number. If you are entering a negative number, include a minus sign.

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a$.$ By what amount has aggregate demand changed?

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$$ $ $-60$ Numeric Response $1.$Edit Unavailable. $-60$ correct.billion

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b$.$If the marginal propensity to consume is $0\mathrm{.}80,$ what is the expenditures multiplier?

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$5$ Numeric Response $2.$Edit Unavailable. $5$ correct.

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c$.$ By how much will investment demand need to change in order to restore the economy to long$-$run equilibrium?

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$$ $ $12$ Numeric Response $3.$Edit Unavailable. $12$ correct.billion