Analyze and sketch a graph of the function. Find any intercepts, relative extrema, points of inflection, and asymptotes. (If an answer does not exist, enter DNE. ) y = 5−4x−x3 intercepts (x, y) = ( ) (smaller x-value) (x, y) = ( ) (larger x-value) relative minimum (x, y) = ( ) relative maximum (x, y) point of inflection (x, y) = ( ) Find the equation of the asymptote. Use a graphing utility to verify your results.