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the transfer function of an armature-controlled DC motor with armature voltage as the input and angular speed as the output is the following: N(s) Ea(s) Kt (sLa+Ra) (Js+b) + KtKb (a) For the following set of motor parameters, determine the poles of the above transfer function. Ra =3 b La = 6.2 x 10-6 H Kt J = 252 10-6 kg-m Kb = 6 x 10-4 Nm/rad/s = 0.2 Nm/A = 0.2 V/rad/s (b) Determine a reduced-order approximation of the given transfer function. (c) Plot the step response of the original transfer function and the reduced-order transfer function on the same set of axes. You may use the MATLAB command step. Explain