The owners of the coffee shop would like to know if there is a difference in purchases ($) made in the mornings (7am to 12pm) and the afternoons (12pm to 5pm). The following tables summarise the descriptive statistics for the morning and the afternoon purchases.

Morning		Afternoon
Mean	18.2		Mean	8.2
Median	20		Median	7.4
Mode	20		Mode	6
Standard Deviation	4.3		Standard Deviation	3.7
Sample Variance	18.5		Sample Variance	14.0
Range	12.5		Range	10.5
Count	12		Count	12

a) Would you describe the shape of morning purchases as being symmetric, skewed to the left or skewed to the right?

b) Would you describe the shape of afternoon purchases as being symmetric, skewed to the left or skewed to the right?

c) Can you find the interquartile range for either sets of data? Briefly explain.