A qualitative plot of variation of probability density, ${\Psi }^2\left(r\right)$, as a function of distance(r) of the electron (X) from the nucleus of hydrogen like species of atomic number ‘Z’ is given below. Which of the given statements is incorrect? 

The difference between the principal quantum number and the azimuthal quantum number for X is 2

Average potential energy of  X can be  $\approx -3.02Z^{2}eV$

Average kinetic energy of X can be   $6.8Z^{2}eV$

Magnetic quantum number of X can have values of  $-2, -1, 0, +1,+2$