According to Chapter 6, in what different ways does Sai Baba manifest his presence to his devotees?

Chapter 6 explains that Sai Baba's presence is not limited to his physical form and can be experienced in various ways. The text notes that the mere utterance of the word 'Sadguru' brings Sai to mind, as if he is standing right there. It also describes how, when devotees read scriptures, Sai can take the form of Rama or Krishna, making them feel as if they are hearing His own life story. As an example, Chapter 6 mentions that while listening to the Bhagavat, a devotee might perceive Sai as Krishna, singing the Uddhava Gita for their welfare, demonstrating his omnipresent nature.