Based on the introduction to Chapter 43, what specific topics does the author promise to cover regarding Sai Baba's Mahasamadhi?

Chapter 43 explicitly outlines the topics it will cover to complete the story of Sai Baba's passing. The author promises to narrate how, as his end approached, Sai listened to the Ramayana for his own benefit. The chapter also states it will detail how the planning for the Samadhi (tomb) took place and explain an event referred to as the 'fall of the brick'. Additionally, the text previews a story from the past, where Baba appeared to have left his body for three full days, causing people to prepare for his final rites, only for him to return, startling them. This narration is intended to provide a full picture of the events surrounding his departure.