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The relevant equations are

E=Ex+Ey+Ez

=((hbar^2*pi^2)/2m) +(nx^2)/a^2+(ny^2)/b^2+(nz^2)/c^2

So far I have plugged in the a,a, and 2a into the equation and factored out the a. I am confused at what it means by first excited state. In a hydrogen atom n=2. In this case should each component =2 or should the energy add up to 2?