need solution for 5d)?

5. Given R=(aaab+bba) and S=(abab+aba) a) Give an example of a string of length five that is neither in the language of R nor in S. [2 marks] b) Give an example of a string of length five that is in the language of S but not R. [2 marks] c) Give an example of a string of length five that is in the language of R but not S. [2 marks] d) Give an example of a string of length five that is in the language of R and S. [2 marks]