At a picnic, there is a contest in which hoses are used to shoot water at a beach ball from three directions. as a result, three forces act on the ball, upper f subscript 1 baseline overscript right-arrow endscripts, upper f subscript 2 baseline overscript right-arrow endscripts, and upper f subscript 3 baseline overscript right-arrow endscripts (see the drawing). the magnitudes of upper f subscript 1 baseline overscript right-arrow endscripts and upper f subscript 2 baseline overscript right-arrow endscripts are f1 = 26.0 newtons (n) and f2 = 54.0 n. determine (a) the magnitude of upper f subscript 3 baseline overscript right-arrow endscripts and (b) the angle θ such that the resultant force acting on the ball is zero.