**Part A**
How many possible combinations are there for the values of
*l* and *m**l* when *n* = 2?
Express your answer as an integer.
? = possible combinations

## Answer

when n = 2 ll will have n-1 values = 2-1 = 1 so 0,1 two values are possible if l = 0 ml = 0 if m = 1 ml will be -1, 0, -1 so possible values are 2, 0, 0 2, 1 , -1 2, 1, 0 1, 1 , -1all these are possible