Use a pseudo-random number generator to simulate a sample of 15 independent observations in which 13 of the 15 are drawn from the uniform distribution on the interval [−1, 1] and the other two are drawn from the uniform distribution on the interval [−10, 10]. For the 15 values that are obtained, calculate the values of (a) the sample mean, (b) the trimmed means for k = 1, 2, 3, and 4, and (c) the sample median. Which of these estimators is closest to 0?