Complete Question
The complete question is shown on the first uploaded image
Answer:
a
The correct option is d
b
The correct option is b
Explanation:
From the question we are told that
The sample size is

The mean is

Generally the population is all law firms in the country because it is the entire pool from which a statistical sample is drawn
The sample are the law firm that where surveyed because it is the statistical sample is drawn from the population