Q$5.[6$ points$]$: An organization is granted the block $130\mathrm{.}34.\frac{16\mathrm{.}0}{20}.$ The organization needs to create $4$ equal subnets.

a$)$ What is the subnet prefix length $($the network portion of the IP address$)$ for each subnet?

b$)$ What is the maximum number of hosts that we can attach to every subnet?

c$)$ Write down the first and last IP addresses for every subnet in the form a$.$b$.$c$.$d$/$x$.$