Verify that $\underline{a}$ and $\underline{b}$ are perpendicular to $\underline{b} \times \underline{a}$ where $\underline{a}=3\underline{i}-\underline{j}+5\underline{k}$ and $\underline{b}=4\underline{i}+3\underline{j}-2\underline{k}$.