An ISP has been assigned the address space 138.46.56.0/21. The ISP has as customers companies each one of which requires 60 IP addresses.

i) What is the maximum possible number Nmax of such companies that this ISP can support?

ii) Provide the IP address assignment to the first and last company using dotted decimal notation; note that first company is the one that will receive the smallest network address, and last company is the one that will receive the largest network address.

iii) For both the first and last company, provide the smallest and largest IP address that can be assigned to a host of this company using dotted decimal notation. You must briefly show how did you derive each answer.