The stem and leaf display below represents the scores of a group of students in a test. The stem represents the tens part while the leaf represents the units part. Use it
to answer the questions that follow.

Stem. Leaves
2 4 1
3 3 2 3
4 1 5 4 7 5
5 2 3 8 1
6 2 3 1
7 4 3

(i) Construct a grouped frequency table using the class intervals 20 - 29, 30–39,
etc...
(ii) Draw a histogram for the distribution.
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