How an engineer is responsible for drawing up a system requirements specification might keep track of the relationships between functional and non-functional requirements? Discuss with a real-life...

How an engineer is responsible for drawing up a system requirements specification
might keep track of the relationships between functional and non-functional
requirements? Discuss with a real-life example.
Let “Cash request” and “Balance request” are the Functional requirements of a Banking ATM
system. Write two Non-functional requirements of the ATM system and explain why you have
selected these as Non-functional requirements..