Mercer became absorbed in the academic game, 'ABCYA,' this morning. He concentrated on math challenges, first guesstimating the number of marbles in a jar if permitted to view 3D angles of the jar. He then proceeded to rise to the challenge of answering Roman numeral questions and only needed help remembering that the D stood for 500. Mercer is not easily deterred and remains on task and focused when challenged and interested.