2) a)Write the difference equation for the block diagram below and calculate the step response (note: x(k)=y(k)=0 for k<
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2) a)Write the difference equation for the block diagram below and calculate the step response (note: x(k)=y(k)=0 for k<
2) a)Write the difference equation for the block diagram below and calculate the step response (note: x(k)=y(k)=0 for k<0). x(k) z-1 z-1 a + + y(k) z-1 b) Apply a third order mean filter to the input sequence x(k) below and calculate the output sequence y(k). Draw x(k) and y(k) on a graph. 1 2 3 | | 4 5 ه 7 8 otherwise k x(k) y(k) 0 3 O 00 -3 6 3 9 3 -3 0 0