Consider the following information describing a closed economy with no government and where aggregate output is demand determined.All dollar figures are in billions. 
TABLE 21-3
-Refer to Table 21-3.The correct expression for the aggregate expenditure function for this economy is
Definitions:
Stapes
The smallest bone in the human body, located in the middle ear, and is involved in transmitting sound vibrations to the inner ear.
Incus
Also known as the anvil, it is one of the three small bones in the middle ear that helps to transmit sound vibrations from the eardrum to the inner ear.
Cochlear Nerve
A nerve responsible for transmitting auditory information from the cochlea of the inner ear to the brain.
Cochlea
A spiral-shaped, fluid-filled inner ear structure responsible for converting sound waves into nerve impulses.
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