1. The problem statement, all variables and given/known data 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). 2. Relevant equations 3. 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.