A regional ISP is granted $16,384$ Somaddresses starting from $120\mathrm{.}14\mathrm{.}64\mathrm{.}0.$ The regional ISP has decided to dividethis block into four sub$-$blocks, each with $4096$ addresses. Three of these sub$-$blocks are assigned to three local ISPs; the second sub$-$block is reserved for future use. Note that the mask for each block is $/20$ because the Original block with mask $/18$ is divided into $4$ blocks. The first local ISP has divided its assigned sub$-$block into $8$ smaller blocks and assigned each to a small ISP. Each small ISP provides services to $128$ households, each using four addresses. The second local ISP has divided its block into $4$ blocks and has assigned the addresses to four large organizations. The third local ISP has divided its block into $16$ blocks and assigned each block to a small organization. Each small organization has $256$ addresses, and the mask is $/24.$Draw the hierarchical routing