Answer:
max 48, min 17
Explanation:
Apparently, your plot is supposed to be ...
1 | 77889
2 | 011234456677788999
3 | 01123445566678899
4 | 58
The smallest stem is 1, and its smallest leaf is 7, representing a value of 17.
The largest stem is 4, and its largest leaf is 8, representing a value of 48.
The extremes represented by this plot are: max 48, min 17.