In a survey of employees at a fast food restaurant, it was determined that 10 cooked food, 11 washed dishes, 21 operated the cash register, 5 cooked food and washed dishes, 6 cooked food and operated the cash register, 9 washed dishes and operated the cash register, 4 did all three jobs, and 6 did none of these jobs. Complete parts a) through f) below. a) How many employees were surveyed? (Simplify your answer.) H

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