V = Infinity for x<0
	V = 0        for 0<= x < a
	V = +V0      for x => a 

a)	E = hbar^2 Pi^2 / (2 m a^2) (n_x^2 + n_y^2 + n_z^2)
 	
	For graound state, n_x= n_y = n_z = 1

	E = 3 hbar^2 c^2 Pi^2 / (2 m c^2 a^2)
	  = 3 (6.582E-16 eV sec 3E8 m/sec)^2 Pi^2 / (2 938.3e6 eV 2E-14^2)
	  =  1.54E6 eV = 1.54 MeV
b)	First excited state
	   n_x = 2 n_y = 1 n_z =1
	E = 6/3 E_0 = 2 E_0 = 3.08 MeV

	Second excited state
	   n_x=2 n_y=2 n_z=1
	E = 9/3 E_0 = 3 E_0 = 4.62 Mev

c) 	Degeneracy:
	n_x   n_y  n_z
	 2     1    1
	 1     2    1    Three fold degeneracy for first excited state
	 1     1    2

	 2     2    1
	 2     1    2    Three fold degeneracy for second excited state
	 1     2    2

a)	|L| ~ l hbar
-->	l ~ L/hbar = 4.83E31/1.055E-34 = 4.58E65
b)	fractional change = 1/4.85E65 = 2.2E-66 !!!