(1 point) The Nearsighted Cow Problem: A Calculus Classic. A rectangular billboard 8 feet in height stands in a field so that its bottom is 8 feet above the ground. A nearsighted cow with eye level at 4 feet above the ground stands x feet from the billboard. Express, the vertical angle subtended by the billboard at her eye, in terms of x. Then find the distance | the cow must stand from the billboard to maximize 6. 0(x)| = is maximized when xo|= 8(x) Nearsighted Cow Problem