u can have IIS and Apache (MSAS) on the same computer if u configure them corectly ... both try to use the port 80 of your pc ... but u can set one on another ...
U must to set your pc for acept conection on port 80 or whatever u use for MSAS (if u have a firewall, a proxy, etc ...)
the other people on the same class can see your local server inserting your IP on the browser (
http://YOUR_IP) . If they're on another IP Class it depend on how the router and the firewall in the middle are configured.
Bye.