What is the tension on one of the wires on the left side of a 150 kg 8 m plank.?

An 8 m gang plank used by workmen to repair a side of a building is hanging from four cables attached to each corner of the plank. A compressor with a mass of 350 kg is 2 m from the left end of the plank. If the gang plank has a mass of 150 kg and a 100 kg workman climbs on and sits in the middle of the board, what is the tension in one of the wires on the left side?