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1. Using only basic physics, no algebra, and no equations, show that at T=OK, E_F=(E_C-E_D)/2 in an n-type semiconductor with N_DD = 10 and N_AA = 0.

2. Using only basic physics, no algebra, and no equations, show that at T= OK, E_F = (E_C-E_D) in an n-type semiconductor with N_DD = 10 and N_A=1.

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