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(**) Find the distance from the origin to the closest point(s) on the graph of 18x4 + 8xy + 18y - 19 We begin by computing ar implicitly for points (x, y) on the graph, obtaining: dy dx We need to minimize the following function of a and y: f(x, y) There are four critical points, located at the following x- values (listed in increasing order): C1 = 20 2 FEB 2 3 = 2 4 Thus there is/are point (s) closest to the origin, one of which is (x, y) = and its distance from the origin is