$5)$ Consider a p$**$n$*$p BJT with uniform doping in each region. Sketch the energy$-$band diagram for the case when:

$$The BJT is in thermal equilibrium

$$The BJT is in forward active mode

$$The BJT is in saturation mode

$$The BJT is in cut$-$off mode

$$Repeat $1$ for an$*+$p$*$n BJT

Consider a p$^(++)$n$^(+)$p BJT with uniform doping in each region. Sketch the energy$-$band diagram

for the case when:

a$.$ The BJT is in thermal equilibrium

b$.$ The BJT is in forward active mode

c$.$ The BJT is in saturation mode

d$.$ The BJT is in cut$-$off mode

$6)$ Repeat $1$ for a n$^(++)$p$^(+)$n BJT