Consider the following statements about Sikh Gurus:
- Banda Bahadur was appointed as the military leader of the Sikhs by Guru Tegh Bahadur.
- Guru Arjun Dev became the Sikh Guru after Guru Ram Das.
- Guru Arjun Dev gave to Sikhs their own script Guru Mukhi.
Which of the statements given above is/are correct?