ii$)$ Determine the output voltage $\backslash ($ V$\_\{\backslash$text $\{$out $\}\}\backslash )$ using the Wheatstone bridge arrangement indicated below.

Figure $1$

iii$)$ Determine the value of $\backslash ($ R$\_\{4\}\backslash )$ required to ensure that there is zero deflection of the galvanometer connected between points C and $(3$m$)$