Consider a saturated load device in which the gate and drain of an enhancement-mode MOSFET are connected together. The transistor drain current becomes zero when \(V_{D S}=0.6 \mathrm{~V}\).

(a) At \(V_{D S}=1.5 \mathrm{~V}\), the drain current is \(0.5 \mathrm{~mA}\). Determine the small-signal resistance at this operating point.

(b) What is the drain current and small-signal resistance at \(V_{D S}=3 \mathrm{~V}\) ?