Identify the parameter, statistic, and population when they appear in each of the following statements.
(a) During a recent year, forty-one different movies received the distinction of generating the most box office revenue for a weekend.
(b) A survey of 400 minority persons living in Chicago revealed that 41 were out of work.
(c) Out of a sample of 100 dog owners who applied for dog licenses in northern Wisconsin, 18 had a Labrador retriever.