Subject :Theory of Automata

Please need solution urgently answers all these parts thnks

Q.No.2 (a) What is the basic theme for theoretical study though being a student of practical field of computer science? (10 Marks) (b) How can you define equivalent FAs? Do discuss with suitable examples that there exists some machine that do not recognize any language at all? (c) How can you define a recognizer/acceptor in terms of input and output