The figure below shows the demand (AD) and supply (SS1) curves of medical care. Figure 18.4 
In Figure 18.4, which of the following regions on the graph represents those people who are not willing and able to pay the price P1 for availing medical care?
Definitions:
Reciprocal Square Root
The mathematical operation of taking the square root of a number and then finding the reciprocal of that quantity.
Topsoil Concentration
The measure of nutrients and organic matter present in the uppermost layer of soil.
Fuel Efficiency
An indicator of a vehicle's fuel efficiency, typically measured in miles per gallon (mpg) or liters per 100 kilometers (l/100km).
Gallons Per Mile
A measure of fuel efficiency or consumption, expressing the number of gallons of fuel used per mile traveled.
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