34. Let {X(t), −∞ denote the power spectral density of the process.

(i) Show that R(w) > = R( > −w). It can be shown that R(s) = 1 2π

 ∞

−∞

R(w)e > iws dw

(ii) Use the preceding to show that

 ∞

−∞

R(w)dw > = 2πE[X2(t)]