Five forces act on a link in the gear-shifting mechanism of a lawn mower. The vector sum of the five forces on the bar is zero. The sum of their moments about the point where the forces Ax and Ay act is zero. (a) Determine the forces Ax, Ay, and B. (b) Determine the sum of the moments of the forces about the point where the force Bacts. 25 kN [ 20 650 mm 450 mm 30 kN 45 -650 mm 350 mm