For the following product structure tree,how many units of part E will be required for each A? 
Definitions:
Full-court Basketball
A basketball game where teams play on the entire length of the court, involving more extensive running and strategy.
Pregnancy
A physiological condition in women and female mammals during which an embryo or fetus develops in the uterus.
Exercising Throughout Pregnancy
Physical activity recommended during pregnancy to improve health outcomes for mother and baby, modified according to each trimester.
Heart-rate Maximum Method
A formula used to estimate an individual's maximum rate of heartbeat during intense physical activity.
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