The horizontal axis gives eta from 0 to 2, and the vertical axis gives F of xi and eta from about 1 to 5. The legend lists epsilon 0.5, epsilon 1.0, and epsilon 1.5. The curves are grouped by R i 0, 5, and 10. For epsilon 0.5, the curves approach 2 as eta increases. For epsilon 1.0, the curves rise to about 3.5 and then decrease towards 2. For epsilon 1.5, the curves rise highest, reaching about 5, and then decrease towards 2. Higher R i values increase the curve height.