In a tug-of-war game on one campus, 15 students pull on a rope at both ends in an effort to displace the central knot to one side or the other. Two students pull with force 198 N each to the right, four students pull with force 94 N each to the left, five students pull with force 66 N each to the left, three students pull with force 156 N each to the right, and one student pulls with force 254 N to the left. Assuming the positive direction to the right, express the net pull on the knot (in N) in terms of the unit vector . -512 net N How big is the net pull on the knot (in N)? (Enter the magnitude.) -230 N What direction is the net pull on the knot? O to the right to the left O The magnitude is zero.