A random sample of 40 college professors is selected from all professors

at a university. The following list gives their ages.
65
46
45
42
37
53
44
49
46
23
59
64
52
44
62
62
51
45
57
29
35
69
49
43
37
34
49
32
20
45
62
31
30
45
20
31
42
38
32
50
How do I construct a stem and leaf plot for this data?