Consider a random process () defined by: () = 2 cos 0 where is a constant and is a uniform random variable over (0,1). (a) Sketch three typical sample functions of (). (b) Find the mean (). (c) Find the autocorrelation function (, ) of (). (d) Find the autocovariance function (, ) of (). (e) Determine whether () is Wide-Sense Stationary (WSS) and explain your reasoning