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Notice that student 10 has 4 grades corresponding to 4 courses that she took. These are repeating groups. Therefore, the table is unnormalized, because it isn't in 1NF.
So, to put it in 1NF, we must REMOVE the repeating groups. One way to do that is as follows:
10 Smith Mary 100 Jones Sally A CIT150
10 Smith Mary 100 Jones Sally B CIT160
10 Smith Mary 100 Jones Sally C CIT170
10 Smith Mary 100 Jones Sally A CIT180
20 Adams William 200 Johnson Charles A CIT150
20 Adams William 200 Johnson Charles B CIT160
30 Davis Robert 100 Jones Sally B CIT150
30 Davis Robert 100 Jones Sally A CIT160
It is now in 1NF...
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