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• 0:27:02: Q1 Can you spot another illusion in this picture? ANS: “blue” and “green” is actually same color

• 0:31:58: Q2 what is this coming from? what is the teminology? ANS: aliasing

• 0:42:47: Q3. Did you see all these before in your signal processing classes? ANS:nan

• 0:48:41: Q4 what is the fourier transform of pulse train P(w)? ANS: a pulse train with frequency 1/T