### Exercise condition:

5
The following data shows the marks of $$20$$ students in the mathematics exam out of $$100$$. Then answer the following questions.

45, 7266, 9689, 72, 96, 66, 45, 72,89, 96, 66, 45, 72, 89, 66, 96, 45, 72.

Questions:

I)The mode of a given set of data is .

II) How many students scored centum in the mathematics exam?

III) How many students scored above $$90$$ marks in the mathematics exam?