A plate clutch consisting of two pairs of contacting surfaces with coefficient of friction 0.2 has a torque transmitting capacity of 600 N-m. The inner and outer diameters of the plates are 200mm and 100mm. What is the axial force required to avoid slip between the plates? Assume uniform pressure theory. (a) 77 kN (c) 100 kN (b) 38.6 kN (d) 17.3 kN