Answer:
Here's what I get
Explanation:
Lakota's dot plot might have looked like the one below.
It shows a spread in class sizes from 10 to 50.
There is a peak of seven classes with 30 students.
There is a gap at 40, where there are no classes.
They divided the class sizes into clusters or groups. It looks like class sizes from 1 to 10 form the first cluster. The next cluster ranges from 11 to 20, and so on.
The size and colour of the dots are not important.