1)
Why did he say "Asher Bechartem Asher She'eltem"?
1.
Malbim: There are two possibilities. (a) The king can be attributed to you, for you chose to have a king; Hashem did not want this. (b) He can be attributed to Hashem, for you asked for a king, but Hashem chose that it will be Sha'ul.
