7. A population has a mean of u = 60 and a standard deviation of o = 12. a. For this population, find the z-score for each of the following X values. X = 69 X = 84 X = 63 X = 54 X = 48 X = 45 b. For the same population, find the score (X value) that corresponds to each of the following z-scores. 7 = 0.50 z = 1.50 Z = -2.50 Z = -0.25 z = -0.50 Z = 1.25