I really need help I am doing this work base learning for this guy and he gave me the specs and i never did this before so i need help bad.

here is what he gave me

first place: BGC Main office

5 pc's and 1 laptop all must be connected in
one of the computers is a mac
pc's have diff. os's

description of what needs done:
computers need to be networked to tralk to eacch other; a wireless internet conn. will be brought in to connect to the internet

1 8-port ethernet hub
1 router

2 location;
main office:
5 more pc's and another laptop
wireless connection brought in

1 hub
8 port ethernet
router capability or seperate (wireless conn. to router ; router to hub



third place: youth center
8 pc's plus laptop
wireless conn. brought in
hub
8 or 16 port
router capability or seperate (wireless conn. to router ; router to hub
all comp. are windows based

this is all he gave me so if some one would be kind as to give me a little layout i would be most appreciated thank you