What are the amplitude, period, and midline of f(x) = 5 sin(x − π) + 3?

a. amplitude: 5; period: π; midline: y = 3

b. amplitude: 3; period: pi/2; midline: y = 5

c. amplitude: 3; period: pi/4; midline: y = 5

d. amplitude: 5; period: 2π; midline: y = 3

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%