(2) The stochastic process X (t) is a complex WSS with autocorrelation 12(1) and power spectrum 3(a)). Then, R(r) is always real and even. (a) True (b) False (3) The stochastic process X0) is real WSS with autocorrelation 120?) and power spectrum 3(a)). Then, 3(a)) is always even. (a) True (b) False (4) X1, X2, X, are i.i.d., uniform in (0,1) and Y=X1+X2+X3. Then, the plot of fY(y) is most nearly . 0') f 0) y) f0)?! 0) y y y y y (a) (b) (c) ' (d) ' (e)