In a survey of employees at a fast-food restaurant, it was determined that 13 cooked food, 15 washed dishes, 25 operated the cash register, 4 cooked food and washed dishes, 6 cooked food and operated the cash register, 8 washed dishes and operated the cash register, 2 did all three jobs, and 6 did none of these jobs. Complete parts a) through f) below. a) How many employees were surveyed?
b)How many employees only cooked food?
c) How many of the employees only operated the cash register?
d) How many of the employees washed dishes and operated the cash register but did not cook food?
e) How many of the employees washed dishes or operated the cash register but did not cook food?
f) How many of the employees did at least 2 of these jobs?

Please help. I will mark brainiest and 5 stars. I have been on this for so long.