Problem $8.$ Consider a subnet with prefix $123\mathrm{.}116\mathrm{.}32\mathrm{.}128/26.$

a$)$ Give an example of one IP address $($of form $x.x.x.x)$ that can be assigned to this network.

b$)$ Suppose an ISP owns the block of addresses of the form $123\mathrm{.}116.\frac{32\mathrm{.}64}{26}.$ Suppose it wants to

create four subnets from this block, with each block having the same number of IP addresses.

What are the prefixes $($of form a$.$b$.$c$.$d$/$x$)$ for the four subnets?