Here is a data set:

66	73	65	67	59
60	63	74	78	72
66	64	75	61	74
61	57	59	64	63

You are examining the data with a split stem-and-leaf plot. Here is the start of the plot:
5 | 799
6 | 0113344
6 | 5667
7 |  
7 |  

What should be entered in the second to last row of this table?

7|