d$.$ Use the Nernst equation to calculate the equilibrium potential if the membrane is permeable to only

sodium ions. Assume $R($gas constant$)$ is $1\mathrm{.}987$cal$/($degree$*$ mol$)$; $T$ is $293K$ at $20C,F($Faraday constant$)$ is $23,062ca\frac{l}{}(degree*mol).$

My work

$G=RTln\frac{[c_1]}{[c_0]}+zFEm$

$=\frac{(1\mathrm{.}987)(293{)}_{x}ln(\frac{140}{10})+(0)}{(23062)(1)}$

$=\mathrm{.}067mV$

help get Correct answer of $150/15$

e$.$ Use the Nernst equation to calculate the equilibrium potential if the membrane is permeable to only potassium ions.

My work:

$\frac{(1\mathrm{.}987)(293)ln(\frac{5}{140})}{(23062)(1)}$

$=-0\mathrm{.}084mV(ovt)$

help get correct answr of $15/150$ not sure where i went wrong