In the brake system shown below, the clockwise couple Mc is applied to the brake drum C. (i) Determine the largest force exerted by the hydraulic cylinder on brake arm AB for which the brake drum will rotate if Mc is 300 Nm a. clockwise b. counterclockwise. The coefficient of static friction between the drum and arm is 0.50. (ii) If the coefficient of kinetic friction between the drum and arm is 0.40 and the hydraulic cylinder pushes end B to the left with a force of 1 kN, determine the friction force acting on the drum when the couple Mc is 300 Nm a. clockwise b. counterclockwise.