The decreasing order of energy for the electrons represented by the following sets of quantum numbers is

1) $n=4,l=0,m=0,s=\pm 1/2$    2)  n=3, l=1, m=1,s=-1/2 
3)  n=3, l=2, m=0,s=+1/2                     4)  n=3, l=0, m=0,s=-1/2