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I know that functional requirements are requirements that tell the system what to do while non-functional requirements are about quality and constraints. For below requirements, which of these will fall under non-functional or functional?
UI must be graphical in nature. I would put this under non-functional requirements because it talks about the quality of the system. I am not too sure.
Users must be able to view information instantly. This could be functional but at the same time, the adverb 'instantly' could be related to performance. So that could also fall under non-functional requirements
Every user should run on a separate client process. This tells the system to run a process for each user. This could be functional, although I am not too sure, as this could be related how the system is implemented.