10-1 the known number one low communication m (t) of the frequency spectrum of m (f) for

When | | f less than 200 hz M (f)=1 - | | f/200 other things

M (f)=0

(1) if the fs=300 hz rate to ideal sampling of m (t), try to draw sketches to sampling signal (t) ms spectrum

(2) if the fs=400 hz rate sampling, remaking an