Consider a subnet with prefix $192\mathrm{.}168\mathrm{.}56\mathrm{.}128/26.$ Give an example of one IP address

$($of form

XXX$.$XXX$.$Xxx$..$xXx$)$ that can be assigned to this network. Suppose an ISP owns

the block of addresses of the form $192\mathrm{.}168\mathrm{.}56\mathrm{.}32/26.$ 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$.\frac{d}{x})$ for the four subnets?