Problem #2: a. Calculate the Grashof condition for each fourbar mechanism defined below: L1 L2 L3 L4 1.5 10 7 3.5 8 2 6 5 12 8 6 1.5 b. For each mechanism provide the Barker Complete Classification: i. Type. li. Class. iii. Code. c. Which of the above mechanism(s) would you pick for Liftgate shown below and why? Folded position To operate: Link 4 1. Release toggle 2. Lift tailgate Link 3 Truck tailgate (Link 2) Truck body (Link 1) d. Draw a sketch of the lift gate to define which parts are links and joints. Using Kutzbach's equation demonstrate that the liftgate is either a Structure or Mechanism. Make clear your decision. Kutzbach's modification of Gruebler's equation: M = 3(L- 1) - 231 - J2 where: M = degree of freedom or mobility L = number of links J1 = number of 1 DOF (full) joints J2 = number of 2 DOF (half) joints