\(r \propto A^{1 / 3}\)
\(\frac{r_{C s}}{r_{C a}}=\left(\frac{135}{40}\right)^{1 / 3}\)
\(\frac{r_{C s}}{r_{C a}}=\left(\frac{27}{8}\right)^{1 / 3}\)
\(\frac{r_{C s}}{r_{C a}}=\frac{3}{2}\)
$(i) \,A + B → C + \varepsilon$
$(ii)\, C → A + B + \varepsilon$
$(iii)\, D + E →F + \varepsilon$
$(iv)\, F →D + E + \varepsilon$