In the valve actuator mechanism shown, the driving link AC and the valve assembly are connected via the roller A. Derive an expression for the acceleration of the valve (a D) for given values of AC, CAC and angle 0 Using Excel or Matlab, plot the effect of 0 on a p. for a given values of to AC and aac (you may assume values for AC and AC for this part of the question. As a guide, Ac can vary from 2 rad/s to 15 rad/s and ac can vary from 1 rad/s to 10 rad/s). G 80 mm -20 mm Figure Q1 Valve stem Valve