4. (10 points) Choose True or False for each statement below: (a) Drift mobility is a measure of the ease with which charge carriers drift under an applied filed. (b) When the thickness of the resistor approaches the mean free path length, scattering from the surface decrease. (c) Heisenberg's Uncertainty principle is a direct consequence of quantization (a property of waves). (d) Time-independent Schrodinger equation is a simply differential equation for a space- dependent undamped vibration. (e) Wavefunction must be a continuous, single-valued function with a continuous derivative.