1)
Why did he command Avishai, and not Yo'av?
1.
Radak (5): He wanted to depose Yo'av from being the head general, because he killed Avshalom.
2)
Amasa had not gathered Bnei Yehudah. Who should Avishai take?
1.
Rashi: Take the people around me.
3)
What is the grammatical form of "Yera"?
1.
Radak #1: It is Po'el Omed (the action applies to the subject himself). It will be bad for us.
2.
Radak #2: It is Po'el Yotzei (acts on with them else). He will do bad to us.
4)
What is the meaning of "v'Hitzil Einenu"?
1.
Rashi: The verse is abbreviated; he will save himself from our eyes.