Question: Using the Kaiser window, design a bandstop FIR filter based on the following specifications:
stop-band edge frequencies = 0.3Π and 0.7Π;
pass-band edge frequencies = 0.4Π and 0.6Π;
maximum pass-band ripple < 0.05;
maximum stop-band ripple < 0.05;
Use MATLAB to confirm that the designed bandstop FIR filter satisfies the given specifications.