Answer:
12, 25, 26, 26, 26, 34, 35, 39, 42, 42, 50, 72.
Explanation:
A stem and leaf plot works like a digit separator. The left is the first number, which is usually repeated, and the right is the number you add to it.
In this example, 3 is used three times for the numbers 34, 35, and 39.