For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?

In this question given concerning the atom's electron, the number of energy sublevels present in the principal energy level n = 4 is to be determined. For this matter, it should be remembered that the number of sublevels of a certain principal energy level is equal to n. For this item, the number of sublevels is also 4. That is s, p, d and f.

the position of an electron can be explained in 4 quantum numbers

the principal quantum number - n - tells the size of the energy shell

and azimuthal quantum number - l - gives the shape of the orbital or the number of subenergy shells

values of l are from 0 to n-1

since n = 4

values for l are 0,1,2 and 3

theres a total of 4 energy sublevels - s, p, d and f