Given an IP address of $193\mathrm{.}10\mathrm{.}10\mathrm{.}0$ answer the following questions if the number of subnets created is $4.$

Determine the network address and the broadcast address for each subnet.

$($b$)$ Determine the subnet mask. $\_\_\_\_\_.\_\_\_\_\_.\_\_\_\_\_.\_\_\_\_\_$

$($c$)$ Determine the number of usable hosts per subnet $\_\_\_\_\_\_\_\_\_\_\_\_\_$