Four signs are mounted on a frame spanning a highway, and the magnitudes of the horizontal wind forces acting on the signs are as shown. Determine the magnitude and the point of application of the resultant of the four wind forces when a = 1 ft and b = 12 ft.

3 ft t2.5 f 50 Tb 160 1b 8 ft 105 lb 5 ft g ft 53 ft