A uniform beam weighing 1300N is attached to a vertical wall so that it is perfectly horizontal. the beam is 8 m long. A support race is anchored to the wall beneath the beam, making contact with the beam 3 m away from the wall at an angle of 25 degrees. the maximum force the brace can withstand along the length is 7000N. what is the farthest out onto the beam an 800N construction worker can walk before the brace fails?