Let y (t) = x (t) ? h (t) and let x (t) = rect(t + 4) ? rect(t ? 1) and let h (t) = tri(t ? 2) + tri(t ? 6) .
(a) What is the lowest value of t for which y (t) is not zero?
(b) What is the highest value of t for which y (t) is not zero?
(a) What is the lowest value of t for which is not zero? -3.5
(b) What is the highest value of t for which is not zero? +8.5
All non-zero values of x are in the time range -4.5
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