If the tension developed in either cable AB or AC cannot exceed 1000 lb, determine the maximum tension that can be developed in cable AD when it is tightened by the turnbuckle. Also, what is the force developed along the antenna tower at point A? Determine the force in each of the three cables needed to support the tractor tread assembly, which has a mass of 8 Mg.

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30 ft 10 ft B x 15 ft 12.5 ft N E 10 ft 15 ft