To do: 1)define nd, na, and ni in si and provide common units for each. 2)sketch in an energy band for si the positions of na, nd, ei, ec, and ev. define those terms not defined in 1. 3)if na> nd by a few orders of magnitude where will ef be in the energy band or si? 4)if nd=1e+16cm-3, determine n, p, at 300k.