In the four-bar linkage shown in Fig. 2.1, link 2 is to rotate completely and link 4 oscillate through an angle of 75. Link 4 is to be 114 mm long; and when it is at one extreme position, the distance O ₂ B is to be 102 mm and at the other extreme position 229 mm. Determine the length of links 2 and the minimum transmission angles.