A common - source amplifier, such as shown in provided circuit image.14 in the text, has parameters ro $=100 \mathrm{k} \hat{\boldsymbol{\vartheta}}$ and $\mathrm{RD}=5 \mathrm{k} \hat{\boldsymbol{\vartheta}} \hat{\boldsymbol{\vartheta}}$. Determine the transconductance of the transistor if the small - signal voltage gain is $\mathrm{Av}=-10$. Assume $\mathrm{RSi}=0$