The parameter values for a certain armature-controlled motor are KT = Kb = 0.2 N . m/A

Question:

The parameter values for a certain armature-controlled motor are
KT = Kb = 0.2 N . m/A
c = 5 x 10-4 N-m-s/rad
Ra = 0.8 Ω
La 4 x l0-3 H
I = 5 x 10-4 kg-m2
Where c and I include the effect of the load
Obtain the step response of ia(t) and ω(t) if the applied voltage is va = 10V.
Obtain the step response of ia(t) and ω (t) if the load torque is TL = 0.2 N.m.