Are the boats on opposite tacks?
See the definitions of Tack and Leeward and Windward.
Which boat is obliged to keep clear at each stage?
See Rule 10
Has the give way boat kept clear of the right of way boat at the final point in the illustration?
See definition of Keep Clear.
If the give way boat has not kept clear, what obligation, if any, does the right of way boat have?
See Rule 14.
Does Rule 18 concerning mark-room apply?
See Rule 18.1(c): Is the meeting between a boat approaching a mark and one leaving it?
Does Rule 16 concerning changing course apply?
See Rule 16.1: Is the boat changing course a right of way boat?