1) An LTI (Linear Time Invariant) system is given below with an input x[n] and output y[n] y[n] ={x[n] + x[n – 1] + x[n – 2]} and x[n] = u[n] – u[n – 1] %3D Compute for this system, a) h[n], the impulse response b) Calculate y[n] for given x[n] analytically c) Calculate yn] using graphical convolution d) Is this system causal? Why e) What is this system used for?

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