Answer the questions as a starting mark as given in the question, then answer the same questions assuming it is a finish mark.

This scenario was right out of the case book. I’ve attached ISAF Case 28 from the 2009-2012 Cases for your reference, and it explains the rules involved better than I could. As for the case where it is a finish, Rule 18 does not apply per 18.1(a) since they are on opposite tacks on a beat to windward.