Math 153 Concept Check 17 Problem 1) Recall that a ray is a half-infinite line, and the single endpoint of a ray is called the "vertex\". Find a parametrization for a ray with its vertex at the point (2.13) and which passes through the point (0,2,4). Problem 2) Find a parametrization of the line passing through the point (2, 3,4) that is orthogonal to both the vector and to the zaxis. (Hint: The direction vector is orthogonal to both and . What tool do we have for finding a vector orthogonal to two given vectors?)