How many allylic hydrogen atoms are present in the following molecule? 
Definitions:
Total Product Curve
A graphic representation showing how the total quantity of output of a firm changes as the quantity of an input is changed, holding all other inputs constant.
Marginal Product
The increase in output that results from adding one more unit of a specific input, holding all other inputs constant.
Total Product
The total output or production achieved by a firm from a given amount of inputs.
Marginal Product
The additional output produced when one additional unit of an input is employed, with all other factors remaining constant.
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