Consider a standard negative feedback configuration with $G(s)=\frac{1}{(s-2)(s-3)}$ and the controller $C(s)=K_P+\frac{K_I}{s}+K_D s$. The root-locus of $G(s) C(s)$ is presented in the figure below. The gain $C(j \omega)=2$ at $\omega=1 ~ \mathrm{rad} / \mathrm{s}$. The value of $K_D$ is____________(rounded off to one decimal place).
