Please look at Part (c) of the question. How do we know that the Filter is a Low-pass or High-pass and is the filter designed in C a multi-band-pass filter. enter image description here

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  • $\begingroup$ looks like a bandpass filter to me. the transition band that the Kaiser window will do for an LPF or HPF is the same as what will be done to the low corner and the high corner of this BPF. $\endgroup$ – robert bristow-johnson Apr 23 '19 at 23:31

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