a$)$ How many subnets are there in this network?$($answer with an integer number$)$b$)$ The right$-$hand side switch connects a subnet with the last byte as host address $(/24).$ Write the subnetaddress in decimal format:$($a$.$b$.$c$.$d$/$x$)$c$)$ What is the IP address for the default gateway $($first hop router$)$ for host $223\mathrm{.}1\mathrm{.}3\mathrm{.}2$Write the answer in $($a$.$b$.$c$.$d$/$x$)$ decimal format.