Pb 6) For the given pitch diameters of a set of spur gears forming a train, compute the first-order15 D D 30 D 7" D kinematic coefficient of the train. Determine the speeds and directions of rotation of gear 5 & 7. w 120 rev/min 9" D 16 D Pb 7) If internal gear 7 rotates at 60 rpm ccw, determine the speed and direction of rotation of arm 3. 154T 40T 36T 20T 2 uiedt i 3 j 10 if ((3 i)