An ISP is granted a block of addresses starting with 129.80.0.0/16. The ISP wants to distribute these blocks to 2600 groups as follows:

i). The first group has 200 medium-sized businesses; each needs 14 hosts.
ii). The second group has 400 small businesses; each needs 6 hosts.
iii). The third group has 2000 point-to-point links; each needs 2 hosts.
iv). Design the sub-blocks and give the slash notation for each sub-block. Find out how many addresses are still available after these allocations.