1) Answerer 2) Hedger 3) Respondent 4) Responder 1) Hedger 2) Prevaricator 
• (n.) One who equivocates.
E·quiv'o·ca`tor noun One who equivocates. « Here's an equivocator that could swear in both the scales against either scale, yet could not equivocate to heaven.» Shak. 
equivocator 1. A respondent who avoids giving a clear direct answer. 2. Anyone who uses ambiguous or unclear expressions, usually to avoid commitment or in order to mislead; to prevaricate or to hedge: 'When asked directly for his position on disarmament, he was a master as an equivocator.'
[Macbeth] (9) liar