Be not anxious (mē merimnēsēte). First aorist active subjunctive with mē in prohibition. Do not become anxious. See a similar command to the Twelve on their Galilean tour (Mat 10:19.) and in the great discourse on the Mount of Olives at the end (Mar 13:11; Luk 21:14.), given twice by Luke as we see.
How or what ye shall answer (pōs ē ti apologēsēsthe). Indirect question and retaining the deliberative subjunctive apologēsēsthe and also eipēte (say).