The pole $$-$$ zero configuration of a phase lead compensator is given by

The closed loop system , of Figure, is stable if the transfer function $$T\left( s \right) = {{C\left( s \right)} \over {R\left( s \right)}}$$ is stable.

The number of positive real roots of the equation $${s^3} - 2s + 2 = 0$$ is __________.

The number of comparisons carried out in a $$4$$-bit flash type $$A/D$$ converter is