Construct a histogram and a frequency polygon for the following data.

Class Interval      Frequency

30–under 32 .......... 5

32–under 34 .......... 7

34–under 36 ..........15

36–under 38 ..........21

38–under 40 ..........34

40–under 42 ..........24

42–under 44 ..........17

44–under 46 .......... 8