if you could help me understand the process using these few practice problems.

Suppose 9% of students are veterans and 143 students are involved in sports. How unusual would it be to have no more than 6 veterans involved in sports? (6 veterans is about 4.1958%) When working with samples of size 143, what is the mean of the sampling distribution for the proportion of veterans? When working with samples of size 143, what is the standard error of the sampling distribution for the proportion of veterans? Compute P(p