Niki, Jeanette, and Allen are playing a three-way tug-of-war. Three ropes of equal length are tied together. Niki pulls with a force of 210 N, Jeanette pulls with a force of 190 N, and Allen pulls with a force of 200 N. The angles between the ropes are equal. a) Draw a scale diagram showing the forces on the knot. b) Determine the magnitude and direction of the resultant force on the knot.