a. yes there is a condorcet candidate in the election and is Ann. She defeated every other candidates in head to head competition.
b. The result does not violate the condorcet criterion.
based on the result of the election, Ann defeated every other candidates in the election head to head.
Ann vs. Bob:
11 + 6 = 17 voters rank Ann higher than Bob, while 7 + 8 + 1 = 16 voters rank Bob higher than Ann. Therefore Ann defeats Bob head to head, i.e. a majority of voters prefer Ann over Bob.
Ann vs. Claire:
11 + 6 = 17 voters rank Ann higher than Claire, while 7 + 8 + 1 = 16 voters rank Claire higher than Ann. Therefore Ann again defeats Claire head to head, i.e. a majority of voters prefer Ann over Claire. Claire is now out of the running to be a Condorcet candidate.
Ann vs. Dave:
7 + 8 + 6 = 21 voters rank Ann higher than Dave, while 11 + 1 = 12 voters rank Dave higher than Ann. Thus Ann defeats Dave head to head, i.e. a majority of voters prefer Ann over Dave. Behold!
Ann defeats all opponents in head to head competition, and is therefore a Condorcet candidate. According to the Condorcet criterion, Ann should win. [In general, in order to find out if a Condorcet candidate exists, we consider head to head competitions between candidates until a Condorcet candidate appears (because one candidate defeats all others head to head), or we find that there is none (because every candidate loses at least one head to head matchup). So Ann should win.