10. (a) Find a combination of step functions that is equal to 4 when 2 ≤ t ≤3 and equal to 0 otherwise. (b) Write the following function in one line (i.e. without cases) using step functions: (c) Same question for f(t)= = Jo, (t-2)², 0, f(t)=²+2, 1, t≤ 2, t>2. t≤ 1, 1 2.

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