Cutical Ratio $=(\frac{\text{A}\text{c}\text{t}\text{u}\text{a}\text{l}}{\text{S}\text{h}\text{e}\text{d}\text{u}\text{l}\text{e}})(\frac{\text{B}\text{u}\text{d}\text{a}\text{e}\text{t}}{\text{A}\text{c}\text{t}\text{r}\text{a}\text{l}})$

$A=(\frac{4}{4})(\frac{60}{40})=1\mathrm{.}5$ good

$B=(\frac{3}{2})(\frac{50}{60})=1\mathrm{.}5$ good

$C=(\frac{2}{3})(\frac{30}{20})=1$ monitor

$=(\frac{1}{1})(\frac{20}{30})=\mathrm{.}67$

$E=(\frac{2}{4})(\frac{25}{25})=\mathrm{.}5$ check