A stepladder of negligible weight is constructed as shown in Figure P12.57. A painter of mass 70.0 kg stands on the ladder 3.00 m from the bottom. Assuming the floor is frictionless, find
(a) The tension in the horizontal bar connecting the two halves of the ladder,
(b) The normal forces at A and B, and
(c) The components of the reaction force at the single hinge C that the left half of the ladder exerts on the right half. (Suggestion: Treat the ladder as a single object, but also each half of the ladder separately.)

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2.00 m 3.00 m 2.00 m 2.00 m Figure P12.57