The jib crane is pin connected at A and supported by a smooth collar at B. Determine the r...

The jib crane is pin connected at A and supported by a smooth collar at B. Determine the roller placement x of the 5000-lb load so that it gives the maximum and minimum reactions at the supports. Calculate these reactions in each case. Neglect the weight of the crane. Require 4 ft ≤ x ≤ 10 ft.