In the Circuit Shown Below, (A) Write a Mesh Equation $\mathrm { I } _ { \mathrm { s } }$

In the circuit shown below, (a) Write a mesh equation around mesh 1 by summing the voltage drops around mesh 1 .
(b) Write a mesh equation around supermesh formed by meshes 2 and 3 by summing the voltage drops around supermesh.
(c) Write a constraint equation expressing $\mathrm { I } _ { \mathrm { s } }$ by $\mathrm { I } _ { 2 }$ and $\mathrm { I } _ { 3 }$ .
(d) Find $\mathrm { I } _ { 1 } , \mathrm { I } _ { 2 }$ , and $\mathrm { I } _ { 3 }$ by solving the three equations.
(e) Find the voltages $V _ { 1 } , V _ { 2 }$ .