We consider the following observed data

89, 88, 24, 31, 47, 28, 37, 34, 35, 41, 51, 42, 52, 42, 52, 42, 60, 90, 60, 98, 49

1. Derive the five number summary of the given data set.
2. Are there any outliers in the data set?
3. Is the data set symmetric or skewed? If it is skewed, what is the type/direction of its skewness?
4. Sketch the graph of the empirical cumulative distribution function for the data above.