Answer:
7 sublevels (i think)
Step-by-step explanation:
i will assume n is the principle quantum number, so the sublevels is l.
l can equal 0, 1, 2... all the way up to n-1, in this case, 7-1, or 6
This means the sublevels are:
0,1,2,3,4,5,6, for a total of 7 sublevels