4. The crane shown below has mass of 4,000 kg and a base of 3.4 m. The arm of the crane is 22 m and attaches to the center of the crane. If the arm is placed at an angle of 30, what is the largest mass that the crane can hold off the ground without tipping? Crane's center of gravity 0000 30 1.7 m A. 400 kg B. 440 kg C. 4,000 kg D. 40,000 kg E