A discrete-time system can be (1) Static or dynamic (2) Linear or nonlinear (3) Time invariant or time varying (4) Causal or non-causal (5) Stable or unstable Examine the following systems with respect to the properties above. \(a) y(n) = cos[x(n)] +1 (b) y(n) = x(k) - (c) y(n) = x(n) cos(won) (e) y(n) = Trun[x(n)], where Trun[x(n)] denotes the intege by truncation (f) y(n) = Round[x(n)], where Round[x(n)] denotes the i tained by rounding Remark: The systems in parts (e) and (f) are quantizers that perform truncation and rounding, respectively. (g) y(n) = |x {n)|| (h) y(n) = x(n)u(n)