Use the following to answer questions:
Figure: Supply and Demand with Subsidy 
-(Figure: Supply and Demand with Subsidy) Refer to the figure. The quantity traded with a $2 subsidy is:
Definitions:
Vitamin Supplement
A dietary addition that provides nutrients, such as vitamins or minerals, intended to supplement one's nutrition.
IQ Test
A standardized test designed to measure human intelligence and cognitive abilities in relation to an average score for one's age group.
Independent Variable
In an experiment, the condition over which the experimenter has direct control.
Experimental Group
In an experiment, this is the group that receives the treatment or intervention being tested.
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