Locate all the instantaneous centres for the crossed four bar mechanism as shown in Fig. The dimensions of various links are: CD = 65 mm; CA = 60 mm; DB = 80 mm; and ; AB = 55 mm. Find the angular velocities of the links AB and DB, if the crank CA rotates at 100 r.p.m. in the anticlockwise direction. Link 1 2 3 4 Instantaneous Centers N = B 3 A C 30 D