Give a set of four unique quantum numbers for each electron in a 6s orbital.
a. Electron 1: n=6, l=0, ml=0, ms=1/2
b. Electron 2: n=6, l=0, ml=0, ms=-1/2
c. Electron 3: n=6, l=0, ml=0, ms=1/2
d. Electron 4: n=6, l=0, ml=0, ms=-1/2