After tracing the path of a ray of light through a glass prism a student marked the angle of incidence $\left(\angle \mathit{i}\right)$, angle of refraction $\left(\angle \mathit{r}\right)$, angle of emergence $\left(\angle \mathit{e}\right)$ and the angle of deviation $\left(\angle \mathrm{D}\right)$ as shown in the diagram. The correctly marked angles are: