9.19-find the energy of the following discrete signals. 3 (a) S[k] (b) -2 ° 2 (c) (d)

Please in typing format please ASAP Thanks bro for your positive response

Problem. Draw the direct form I and direct form II implementation for the difference equation y[n]-(1/2)y[n-2] =3x[n] - 2x[n-2]

Hi im struggling to understand how you would sketch DC component Va and AC component va for the following questions. Could you show me how on both questions so i understand how to do it on different scenarios. thank you.Also is there like a universal formula i can use as every graph is not the same. Also can u show how to identify the period of each graph.