To make the workgroup i needed to go to the control panel and then click on the icon called 'system'. From this window i was able to change the computer name, which i did to PC1 and PC2, I then changed both of the work groups to EARTH on both of the computers. The computer then needed to be restarted and i was then able to start sharring the computer files.
I was able to share the files by right hanbd clicking on the file in which i wanted to share and then i clicked on sharin