Figure 12 shows a DC electric circuit.
(a) How many meshes are there in the circuit?
(b) How many simultaneous equations are required to establish in the mesh analysis?
(c) By using the mesh analysis, find all the mesh currents in the circuit. Take all the mesh currents in clockwise directions.
(d) Simplify the circuit into its corresponding Thevenin equivalent circuit for the resistor M. Hence, find its power.