The winning time for the 2005 annual race up 86 floors of the Empire State Building was 10min and 49s.?

The winning time for the 2005 annual race up 86 floors of the Empire State Building was 10min and 49s. The winners m was 60kg. (A) If each floor was 3.7 m high, what was the winner's change in gravitational potential energy? (B) If the efficiency in climbing stairs is 25%, what total energy did the winner expend during the race? (C) How many food Calories did the winner "burn" during the race? (D) Of those Calories, how many were converted to thermal energy? (E) What was the winner's metabolic power in watts during the race up the stairs?