$$\begin{gathered} \mathit{Q}\mathbf{ }\mathbf{10}. The minimum value of \left|2z-1\right|+\left|3z-2\right| = \\ \left[1\right] 0 \left[2\right] \frac{1}{2} \\ \left[3\right] \frac{1}{3} \left[4\right] \frac{2}{3} \end{gathered}$$