What supernatural abilities or 'Siddhis' does Chapter 10 attribute to Sai Baba, especially concerning his sleeping plank?

Chapter 10 suggests that Sai Baba possessed 'Great Siddhis' (powers) that defied normal physical laws. The text questions how a narrow plank tied with mere rags could support his weight, implying it was possible only due to these powers. Furthermore, to explain his imperceptible movements, the chapter specifically references the power of 'Anima,' the ability to become minute. It suggests that Baba could move as easily and subtly as flies, insects, or ants, which is how he could ascend and descend from his suspended plank without anyone ever witnessing it.