$4.$ Examine the given network:

b

a$.$ Find, and correctly draw, the Thevenin equivalent circuit for the network external to the terminals marked b and c $.($just remove both resistors between points b and c when applying the Thevenin procedure$).(5$ pts$.)$

Replace the two resistors in between terminals $\backslash ($ b $\backslash )$ and $\backslash ($ c $\backslash ),$ and calculate the following values:

b$.$ Determine the current $\backslash (\backslash$mathbf$\{$I$\}\_\{2\}\backslash )$ with direction. $(\backslash (5\backslash$mathbf$\{$p t s$\}\backslash ).)$

c$.$ What is the voltage across the current source, $\backslash (\backslash$mathbf$\{$V$\}\_\{$I s$\}\backslash ),$ with polarity? $(\backslash (\backslash$mathbf$\{$p t s $.\}\backslash ))$

d$.$ Calculate the power being delivered to $\backslash (\backslash$mathrm$\{$R$\}\_\{3\},\backslash$mathrm$\{$Pr$\}\_\{\backslash$mathrm$\{$R$\}3\}\backslash ).(5$ pts$.)$

e$.$ What is the voltage at point $\backslash (\backslash$mathbf$\{$a$\}\backslash )$ in the network? $(5$ pts$.)$