Using classes without objects

Question

i am confused in this question which i have discussed in the comments of my code
https://code.sololearn.com/c3Mb52RdAeW8/?ref=app
link of the question (question no. 8 in level 1)
https://www.codesdope.com/practice/cpp-classes-and-objects/
plz help me in this question
i am a beginner in Oops so plz explain it in an easier way
thank u!!!

Answer 1

Donna but we are not supposed to create any object of the class
btw thnx for ur help

Answer 2

Donna i have added the link of the question

Answer 3

Question 8 is referring to a static class.

[edit] static member not a static class.

Answer 4

Donna wow!!! excellent!!!
just one more question what is the use of variable n?