here is the circuit >>> http://www.4shared.com/photo/F3ewfm_3/22_online.html
the whole question is here >>> http://www.4shared.com/document/Qwxgzq78/Circuits_for_Modeling.html
whats assigned to me is #22.
anyways, what we need to get here is the differential equations for the state variables because were gonna input the equations in matlab-simulink eh. and im having a hard time getting the differential equations of the circuits