What type(s) of sample would be appropriate for a) a survey of engineers, technicians, and managers.

What type(s) of sample would be appropriate for

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a) a survey of engineers, technicians, and managers employed
by a company?

b) determining the most popular pizza topping?

c) measuring customer satisfaction for a department store?

Communication Find out, or estimate, how many students
attend your school. Describe how you would design a systematic sample of these
students. Assume that you can survey about 20 students.