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 mď ď˝ ď° ABE 126 as shown.
(a) What is the measure of ďDEB? Justify.
(b) What is the measure of ďDEC ? Justify.
(c) What is the measure of ďBCE ? Justify.â