1. Express the given function in terms of unit step function(s). Sketch the graph. a) f(t) = (2, 0≤t<4 5, 4≤t (1², 0≤t<3 9, 3≤t c) f(t) =< 5, 0≤t<2 e) f(t) = 2, 2≤t<4 4, 4≤t =001 ( b) f(t) = { d) f(t)=- -1, 0≤t <2 2≤t 3, 0 sin(t-π), 2t, f) f(t) = π, (211. (s 0≤t<π π≤t cos(t-3π/2), 0≤t<π/2 π/2≤t<3π/2 3π/2≤t

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