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## Homework Statement

Calculate and graph the response of the filter:

y(n) = ½*x(n) + ½*x(n-1)

at the frequencies: i) 0 Hz, ii) sr/4, iii) sr/2 (Nyquist frequency).

## Homework Equations

## The Attempt at a Solution

If I put each of those into the formula as n? But how do i know what sample rate/4 is? I'm guessing that it's a low pass.