Assertion (A): It is not desirable to drive a transistor into hard saturation in high speed switching circuits.

Reason (R): It may not be possible to bring it back to cutoff state, if it is driven into hard saturation.

1. If ensemble and time averages of a random process are identical, the process is ergodic.
2. If ensemble and time average of a random process are not identical, the process is ergodic.
3. An ergodic process is stationary.
4. A stationary process is necessarily ergodic.

1. 0 ≤ F(x) ≤ 1
2. F(- ∞) = 0
3. F(∞) = 1
4. F(x₁) ≤ F(x₂) If x₁ < x₂