Looking at the ring bus configuration above for a $4$ line bus,

Answer the questions about the bus configuration below:

$1.$ Can we suffer a line fault and still be operational? $[$ Select $]["$yes$","$no$"]$

$2.$ Can we take a breaker offline for maintenance still be operational? $[$ Select $]["$no$",$ "yes"$]$

$3.$ Is this cheaper or more expensive than double breaker double bus configuration? $[$ Select $]["$more expensive", "cheaper"$]$

$4.$ Is this more reliable or less reliable than double breaker double bus configuration? $[$ Select $]["$less reliable", "more reliable"$]$

$5.$ How many differential zones do we need for this configuration? $[$ Select $]["3","4","1","5","8","6","7","2"]$