Draw a schematic $($i$.$e$.$ rough, conceptual$)$ reciprocal space representation of an epitaxial layer that is coherently strained to a substrate. Include at least one glancing incident, one symmetric, and one glancing exit plane. Include the origin. For example, draw a reciprocal space representation of epitaxial Ge coherently strainted to a Si substrate with $(224),(004),$ and $(224)$ planes for each of the materials. Fully relaxed Ge has a larger lattice parameter than Si$.$