Let a {a 1 , a 2 , ..., a n } be a sequence of real numbers and {Φ 1 , Φ 2 , ...,Φ n } a sequence of independent random variables which are uniformly distributed over the in terval [0, 2 ]. Determine...

Let a {a₁, a₂, ..., a_n} be a sequence of real numbers and {Φ₁, Φ₂, ...,Φ_n} a sequence of independent random variables which are uniformly distributed over the in terval [0, 2]. Determine covariance- and correlation function of the stochastic process {X(t), t ∈ (−∞, +∞)} given by