The internal angles of a pentagon are shown in the diagram. The coordinate bearing angle of side $L_{12}$ is $\alpha_{12}=30°$. Calculate the coordinate bearing angles of the other sides.<image 1>
['$\\alpha_{23}=75°$,$\\alpha_{34}=160°$,$\\alpha_{45}=220°$,$\\alpha_{51}=280°$', '$\\alpha_{23}=95°$,$\\alpha_{34}=160°$,$\\alpha_{45}=220°$,$\\alpha_{51}=280°$', '$\\alpha_{23}=65°$,$\\alpha_{34}=160°$,$\\alpha_{45}=220°$,$\\alpha_{51}=280°$', '$\\alpha_{23}=85°$,$\\alpha_{34}=160°$,$\\alpha_{45}=220°$,$\\alpha_{51}=280°$']