tn B. Jacob (Exodus, 287) shows that the intent of Moses in using גַּם (gam) is to make an emphatic rhetorical question. He cites other samples of the usage in Num 22:33; 1 Sam 17:36; 2 Sam 12:14, and others. The point is that if Pharaoh told them to go and serve Yahweh, they had to have animals to sacrifice. If Pharaoh was holding the animals back, he would have to make some provision.
tn Heb “give into our hand.”
tn The form here is וְעָשִּׂינוּ (vé’asinu), the Qal perfect with a vav (ו) consecutive—“and we will do.” But the verb means “do” in the sacrificial sense—prepare them, offer them. The verb form is to be subordinated here to form a purpose or result clause.