Why Peter is selllingPeter is selling because he das a debt to his father that was settled through Mellon and that is the related party. It is not a good idea to leave his widowed mother with shares of the company on top of sorrow. Knowing Peter's tight family ties, he would be enclined to do that.
I would not dwell int he exact amounts but it seems a fair way to return the elevator.
I don't mean to be unkind to Peter. He is a great guy.
He could make new friends with The Musk family group.
Having a stream of info on Twitter would be more beneficial than on SH.
FAKDBC