I need clear explanations, please! Watch the Mechanical Energy Conservation video (https://youtu.be/mhIOylZMg6Q) to ans

[answerhappygod]

I need clear explanations, please!
Watch the Mechanical Energy Conservation video( to answer the followingquestions:
1- Describe the energy transformation process as the ball swingsfrom one side to the other. (For example, when does the ball havemaximum KE/PE and when does the ball have minimum KE/PE?)
2- Why does the professor say, “Please be very quiet” and“I hope I will be able to do it [release from his chin] at zerospeed”? What will happen if he gives a non-zero (bigger than 0)speed to the ball when releasing it? Explain why.
3- At the very beginning of the video, the professorcalculated the work he did to the ball when lifting it up from thefloor. Please show how he did the calculation and what physicsconcept/formula he used to do the calculation?