Calculate the conductivity of an n-type semiconductor from the following data:
Density of conduction electrons = \( 8 \times 10^{13} \, \text{cm}^{-3} \)
Density of holes = \( 5 \times 10^{12} \, \text{cm}^{-3} \)
Mobility of electrons = \( 2.3 \times 10^4 \, \text{cm}^2/\text{V-s} \)
Mobility of holes = \( 100 \, \text{cm}^2/\text{V-s} \)