Circuit Shown Below Generates Output Signal Vo Given By $$\mathrm { v } _ { \mathrm { o } } = 10 \mathrm { v } _ { 1 } - 5 \mathrm { v } _ { 2 }$$

Essay

circuit shown below generates output signal vo given by $$\mathrm { v } _ { \mathrm { o } } = 10 \mathrm { v } _ { 1 } - 5 \mathrm { v } _ { 2 }$$
where $v _ { 1 }$ and $v _ { 2 }$ are two input signals. Find $R _ { 1 } , R _ { 2 } , R _ { 3 }$ , and $R _ { 4 }$ .