5 . X 41 = A cos( wet + $)+ B Sin (wet+ $) where A and B are independent random variables with EL A J = EL B ] ZO and ECA'S = ECP's = 12 we and of are constants. (1) E{X(t)} = (a) 1 (b) 2 (c) 0 (d) -1 (e) None (2) R(t , t, ) = (a) coswe(t -tz) (b) since(t, -t,) (c) "'coswe(t, -t, ) (d) cos@(t +t, ) (e) None. (3) Is this stochastic process A (t ) mean ergodic? (a) Yes (b) No