Consider a WSS random process X(t), whose amplitudes are normally distributed with E(x(t)) = 0 and R_x(τ) = e^-2[τ]. Then P(X(t)) ≤ 2) = ?
$$\left( {Q\left( \alpha \right) = \frac{1}{{\sqrt {2\pi } }}\int\limits_\alpha ^\infty {{e^{ - \frac{{{x^2}}}{2}}}} dx} \right)$$

A. True B. False

A. Space diversity B. Frequency diversity C. Broad band antenna D. Directional antenna

A. A double-tuned amplifier B. A high gain D.C. amplifier C. A cathode follower stage D. None of the above

A. Filter method B. Phase cancellation method C. Good attenuation characteristics D. All of the above