Minimax means the smallest worst-case risk: $d_2$

Consider a statistical decision problem with $\Theta=\{\theta_1,\theta_2\}$ and $D=\{d_1,d_2,d_3,d_4\}$. The risk functions are given by:

$$\begin{array}{c|cccc} \theta/d & d_1 & d_2 & d_3 & d_4\\\hline \theta_1 & 4 & 1 & 5 & 2\\ \theta_2 & 1 & 2 & 3 & 3 \end{array}$$

Then: