The value of ${\mathrm{K}}_{\mathrm{P}}$ for the reaction, $A\left(g\right)+B\left(g\right)\rightleftharpoons C\left(g\right)$

is $25 {\mathrm{atm}}^{-2}$ at a certain temperature. The value of ${\mathrm{K}}_{\mathrm{P}}$ for the reaction, $\frac{1}{2}C\left(g\right)\rightleftharpoons \frac{1}{2}A\left(g\right)+\frac{1}{2}B\left(g\right)$ at the same temperature would be: