If ab is parallel to cd and the slope of cd is -5 what is the slope of ab

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Me. i can't figure out this question. give an explanation too. .