The following data represents the distribution of the ages of a sample of 40 executives who work for a large drug manufacturer.

Ages		Number of Executives
35 – 39		6
40 – 44		12
45 – 49		10
50 – 54		8
55 – 59		4
Total		40

Fill in the cumulative frequency distribution below. [4 marks]

Cum. Classes	Cumulative Frequency	Cumulative Percent