In the figure below, lines m and n are parallel: Two parallel lines are shown crossed by a transversal. The angles are labeled with number 1-8. The angles on line m where the line is crossed by the transversal are 1, 2, 3, and 4 in clockwise order from top left. The angles on line n where the line is crossed by the transversal are 5, 6, 7, and 8 in clockwise order from top left.

In the diagram shown, ∠2 measures 77 degrees. What is the measure of ∠4?

5 degrees
77 degrees
103 degrees
180 degrees