Final answer:
To find the z-score, subtract the population mean from the given value and divide by the population standard deviation.
Step-by-step explanation:
The z-score is calculated by subtracting the population mean from the given value and then dividing by the population standard deviation.
For X = 52:
z = (52 - 50) / 5 = 2/5 = 0.4
For X = 60:
z = (60 - 50) / 5 = 10/5 = 2
For X = 49:
z = (49 - 50) / 5 = -1/5 = -0.2