How do you set up share and NTFT permissions, for this specific example.

Here is the scenario.

three xp workstations networked through a peer to peer environment (computer 1,2 and 3. each computer has the same three users listed. For this example user 1, user 2 and user 3. Each user is an administrator. Each computer has one shared folder with sub folders. they are named share 1 share 2 and share 3 respectively to match the computer on which they reside. The permissions for each user both across the network and locally should be as follows.

user 1: full access all three shares
user 2: read only to all three shares
user 3: read only to all three shares.

please elaborate on the share and security configuration to accomplish this.