A $2-\mathrm{m}$ long hollow steel $(\mathrm{G}=75 \mathrm{GPa})$ shaft has an outside diameter of $65 \mathrm{mm}$ and an inside diameter of $75 \mathrm{mm}$. If the maximum shearing stress in the shaft must be limited to $50 \mathrm{MPa}$ and the angle of twist must be limited to one degree, determine the maximum power that can be transmitted by this shaft when rotating at $600 \mathrm{rpm}$.