Find all greatest, least, maximal, and minimal elements for the given set and relation. (Enter your answers as comma-separated lists. If no such elements exist, enter NONE.) A = {1, 2, 4, 7, 14, 21, 28}; the "divides" relation. greatest least maximal minimal Need Help? 18. o /4 points EppDiscMathS 8.5.025. B My Notes 0 Ask Your Teacher Find all greatest, least, maximal, and minimal elements for the given set and relation. (Enter your answers as comma-separated lists of sets. If no such sets exist, enter NONE.) 9(5), where S = {0, 3, 8}; the "subset" relation. greatest least maximal minimal