Question: The amplitude ratio (A(omega)) and phase shift function (phi(omega)) for irrational transfer function (mathrm{G}(s)=frac{e^{-4 s}}{s}) respectively are (a) (mathrm{A}(omega)=-4 omega, phi(omega)=-pi / 2) (b) (mathrm{A}(omega)=1

The amplitude ratio $A(\omega)$ and phase shift function $\phi(\omega)$ for irrational transfer function $\mathrm{G}(s)=\frac{e^{-4 s}}{s}$ respectively are
(a) $\mathrm{A}(\omega)=-4 \omega, \phi(\omega)=-\pi / 2$
(b) $\mathrm{A}(\omega)=1 / \omega, \phi(\omega)=-4 \omega-\pi / 2$
(c) $\mathrm{A}(\omega)=1 / \omega, \phi(\omega)=-4 \omega$
(d) $\mathrm{A}(\omega)=-4 \omega, \phi(\omega)=-4 \omega$.

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