CCNA题,利用划分子网,七个实验室,每个40台机器；把3个group都放在同一个网络下,经理单独放一个,

CCNA题,利用划分子网,七个实验室,每个40台机器；把3个group都放在同一个网络下,经理单独放一个,
抱歉,教授出的英文题,您回答可以用中文,放心我看得懂.
you are hired to create an ip numbering schema to supply the needs of a small college campus.
The college has a student population of 327 Full Time and 250 part time students...
There are 22 administrative staff and 42 support staff
1.There are seven computer labs,each on separated subnets;each lab consists of 40 computers.
2.There are three groups of 5 computers each which are on subnet,but not on the any of the student lab networks.
3.The management has a sub-network of their own,but this network is sub subdivided into three groups(10,7,and 5)
the support staff has a separate subnet off of the management network.
You are given a IP of 172.16.1.0 /23
show all work and explain your layout...

1.7个LAB用一个64块的第1~7个子网就可以了,即172.16.1.0/26（172.16.1.172.16.2.254).
2.接着上回的把这三组5台电脑用三个块为8的子网进行分配.172.16.3.0/29,用前三个子网即可.
3.第三项所给信息不足,这个management网络的网络号是多少?它是否允许分配LAB同域的子网?