please answered questions Exercise 1) a, b.c

please answer questions Exercise 2 (very important )

please answer questions Exercise 3 (very important )

Outcome 1: Analyze a complex computing problem and to apply principles of computing and other relevant disciplines to identify solutions. [Total marks 0.0 marks] Exercise1 Give a BNF grammar for each of the languages below. For example, a correct answer for "the set of all strings consisting of zero or more concatenated copies of the string ab" would be the grammar: S::=abS