Bidwell Electronics Inc. recently surveyed a sample of employees to determine how far they lived from corporate headquarters. The results are shown below:

Distance (km)

frequency

0 X< 5

4

5 X< 10

15

10 X< 15

27

15 X< 20

18

20 X< 25

8

Total

a)Construct a histogram.

b)Construct an ogive.