I$1+$ I$2+$ I$3=0$

R$1$I$1$ R$2$I$2=$ E

R$2$I$2$ R$3$I$3=$E

$($a$)$ Using input$()$ function, prompt user for values R$1,$ R$2,$ and R$3($in Ohms$).$

$($b$)$ Let E $=20$ V $.$

$($c$)$ Write explicit Gauss$-$Jordan elimination algorithm and calculate the values of

the unknown currents I$1,$ I$2,$ and I$3.$

$($d$)$ Display only the value of the current I$2($in Amperes$)$ using either disp$()$ or

fprintf$()$ command.