1. How is the discrete time impulse function defined in terms of the step function? a) d[n] = u[n+1] – u[n]. b) d[n] = u[n] – u[n-2]. c) d[n] = u[n] – u[n-1]. d) d[n] = u[n+1] – u[n-1]. AnswerAnswer: c [Reason:] Using the definition of the Heaviside function, we can come to this conclusion….