Answer Happy

= = 4. Investigate if the following sytems are memoryless, linear, time-invariant, casual, and stable. a. y(t) = x(t – 2) + x(2 – t) b. y(t) = 1246 x(t)dt c. y(t) = (cos(3t)]x(t) d. y(n) = x(n − 2) – 2x(n -8) e. y(n) = nx(n) f. y(n) = x(4n + 1) -00 = = = =