$(1$ point$)$

In the circuit below, G$1=16$mS$,$G$2=75$mS$,$G$3=50$mS$,$G$4=42$mS$,$G$5=46$

mS$.$

What resistance is measured at the terminals of the network below if the switch is:

$($a$)$ open $($open circuit$)$

$($b$)$ closed $($short circuit$)$

$($c$)$ replaced by a $22$ mS conductance

$($a$)$ R$=$

$\backslash$Omega

$($b$)$ R$=$

$\backslash$Omega

$($c$)$ R$=$

$\backslash$Omega