1)
On what grounds did Pharaoh reinstate the chief butler, and execute the chief baker?
1.
Targum Yonasan: Because he discovered that the butler was not involved in the plot to poison him. 1
2.
Riva and Gur Aryeh (to 40:1): It is not always possible to prevent a fly from entering a cup of wine, but a stone in the bread is due to negligence. 2
3.
Malbim: Refer to 40:10:1:1:1 . On this occasion, Pharaoh reviewed all of his underlings on equal standing - officers like lowly servants ("b'Soch Avadav").