I did the same. Just set the column width to be 1, then I used 7 days to make a week. I've stated that the assumption is that work continues 7 days a week, as this is done in some other examples, but I doubt there will be any difference in marks if you go 5 day weeks or 7 day weeks. It's then fairly easy to make the histogram beneath, as you can just add up and shade in the appropriate amount of resource.
To make it simple to get into the assignment document I just took a screen shot and cropped it, then pasted that into the Word document that contained the rest of my assignment. I wouldn't risk cutting and pasting direct from Excel as the Unisa printer can seriously screw up formatting when it hits anything remotely complicated...