I need help with algebra

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

Does the point (1, sqrt 7) lie on circle shown.

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents