You are given the band diagram of a PN junction with doping NA and ND under forward bias of VF below. Which of the following expression correctly describe the electron concentration as described below: (a) 𝑁 𝐴 ;  (b) 𝑁 𝐷 ;  (c) 𝑛 𝑖 2 𝑁 𝐴 ;  (d) 𝑛 𝑖 2 𝑁 𝐷 ;  (e) 𝑁 𝐴 𝑒 𝑞 𝑉 𝐹 𝑘 𝑇 ;  (f) 𝑁 𝐷 𝑒 𝑞 𝑉 𝐹 𝑘 𝑇 ;  (g) 𝑛 𝑖 2 𝑁 𝐴 𝑒 𝑞 𝑉 𝐹 𝑘 𝑇 ; (h) 𝑛 𝑖 2 𝑁 𝐷 𝑒 𝑞 𝑉 𝐹 𝑘 𝑇 At point A above ECp (g) At point A above ECn (b) At point B above ECp (g)