Shear stress magnitudes are:

$$\begin{gathered} {\mathrm{\tau }}_1=75.00 \mathrm{MPa} \\ {\mathrm{\tau }}_2=50.00 \mathrm{MPa} \end{gathered}$$

The rotation of flange $\mathrm{B}$ is:

$$\begin{gathered} {\mathrm{\varphi }}_{\mathrm{B}}=+0.09868 \mathrm{rad} \\ =+{5.65}^{\circ } \end{gathered}$$

Finished