2. For a p-type silicon as shown in Fig. 2, and there is a continuous uniform electron current flowing from the left to the right. Answer the following questions. (a) If electron mobility remains constant with temperature, how does the diffusivity, Dn, change with temperature? Any why? (6%) (b) Explain what govern the minority lifetime ( In) in a semiconductor material and how does In affect the diffusion process? (7%) (c) Let electron density n(x= 0)= no. Write down the expression of the electron concentration at x> 0, where the diffusion lengths are In for electrons and Lp for holes. (7%) Uniformly doped p-type semiconductor A. Fig. 2