Determine the energy and power of the following signals. Classify these signals into energy-type signals and power-type signals. (a) x (t) = e2tu(t) (b) y(t) = Aei (2t + /4) (c) z(t) = A cos (t) (d) w (t) = u(t) Determine if the systems are linear, time-invariant, memoryless, causal, and/or stable. (a) y(t) = x(t-2) + x(2-t) (b) y(t) = cos(3t) x (t) 2t (c) y(t) = x (r)dr - 00 (d) y(t) - (0, t < 0 (x(t) + x (t-2), t 0 t (e) y(t) = x( ) 3