How many electrons in an atom could have these sets of quantum numbers? A) n=3, B) n=5, l=0

How many electrons in an atom could have these sets of quantum numbers?
A) n=3,
B) n=5, l=0 and
C) n=6, l=1, ml=-1

Answer:

Part a
Number of electrons present in the orbital n=3 is image

Part b
Number of electrons present in the orbital n=5, l=0 is image

Part c
Number of electrons present in the orbital n=6, l=1, ml=-1 is image