I would really appreciate it if y’all would help me on this question asap please and thank you

Question 5 spring semester final exam math evaluate

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%