A group of 25 people were observed regarding their TV habits and were found to spend the folowing number of hours per week watching television:
width Range
30 32 34 36 36 37 39 39 41 41 42 42 43 43 44
45 45 45 46 47 47 49 49 52 53

In order to display the data ni clearer form,
(a) determine the class width for four (4) classes,