The table below shows the number of students from different classes of two schools who participated in a sports competition:
School A 25 21 2 22 20 21 20 23 1 School B 3 2 1 5 4 2 3 4 3
Part A: How can you use box plots to compare the median and interquartile range of the data? Write the minimum value, first quartile, median, third quartile, and interquartile range for the two sets of data.
Part B: Are the box plots symmetrical in shape? Justify your answer.