5. Sketch the following functions (a) f(t)= u(t-3), (b) f(t) = u(t+2). (c) f(t) = u(t+2)...

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5. Sketch the following functions (a) f(t)= u(t-3), (b) f(t) = u(t+2). (c) f(t) = u(t+2) - u(t-3). (d) f(t)=2u(t+1)-u(t-1). The definition of the unit step function: u(t)= 1, #20 0, <0. 5. Sketch the following functions (a) f(t)= u(t-3), (b) f(t) = u(t+2). (c) f(t) = u(t+2) - u(t-3). (d) f(t)=2u(t+1)-u(t-1). The definition of the unit step function: u(t)= 1, #20 0, <0.