Happy Monday Everybody

Free 100 points no joke

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

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup