The Circuit Shown Below, Let Use Nodal Analysis to Find $\mathrm { V } _ { 1 }$

Essay

the circuit shown below, let $$\mathrm { I } _ { \mathrm { s } } = 1 \mathrm {~mA} , \mathrm {~V} _ { \mathrm { s } } = 5 \mathrm {~V} , \mathrm { R } _ { 1 } = 1 \mathrm { k } \Omega , \mathrm { R } _ { 2 } = 2.5 \mathrm { k } \Omega , \mathrm { R } _ { 3 } = 5 \mathrm { k } \Omega , \mathrm { R } _ { 4 } = 2 \mathrm { k } \Omega$$
Use nodal analysis to find $\mathrm { V } _ { 1 }$ and $\mathrm { V } _ { 2 }$ .