function is incorrect?!

Question

https://onlinegdb.com/dOOZhcvFO

as much as I know, the function should work.

but he tells me I have a problem with two functions, and I don't know which.

Answer 1

public eQualification setHour(int hour){

You should tell the compiler which enum you want to return, not just that you want to return an enum.

There are more errors. I'll leave you to fix them as one can learn heaps from fixing mistakes. Ask again if you get stuck.

Good luck!