8. In the diagram shown, line m is parallel to line n. They are crossed by transversals r and s. Finally, r and s are perpendicular to each other. It is known that mZABE=126° as shown. (a) What is the measure of ZDEB ? Justify, E . 므 Fm (b) What is the measure of ZDEC ? Justify. 126° А B (c) What is the measure of ZBCE ? Justify.​