Question

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Answer 1

Apply Martin Method to create an FA that does not end at ab and ba only.

Answer 2

I see @mudasirchaudhary3 asked the same question. I presume you're taking the same class.

People might be more helpful if you don't post ".............." as your question. Just saying :).

Answer 3

Here is what I found out about the Martin method after some Googling:
How to avoid dead states in FA using the Martin method:
- Make each state label, as it progresses, based on the input strings.
- Based on the conditions of the Regular expressions or FA, only required states are marked final.
- Not every FA can be modeled in this way!