An ideal current amplifier has the following inputresistance, Rin and output resistance Ro values: \text { Rin }=\infty ; \text { Ro }=\infty None of the given ontions \operatorname{Rin}=0 ; \text { Ro }=\infty \operatorname{Rin}=\Omega \cdot \mathrm{R}=0 \text { Rin }=\infty ; \text { Ro }=0