A communication tower (the side CB) is located at the top (the point C) of a steep hill. The angle of inclination of the hill is 58 degrees. A guy wire is to be attached to the top (the point B) of the tower and to the ground (the point A), 97 m downhill from the base of the tower (the side AC). The angle $\angle BAC$ in the figure is 12 degrees. See the graph

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Find the length of cable (the side AB) required for the guy wire. Your answer is m;