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Using Laplace transform determine the complete response of the system descrbed by the equation,

$\frac{d^{2} y(t)}{d t^{2}}+5 \frac{d y(t)}{d t}+4 y(t)=\frac{d x(t)}{d t}$ ; y(0) = 0 ; $d y(t) / d\left.t\right|_{t-0}=1,$ for the input $x(t)=e^{-2 t} u(t)$.