Two parallel lines are crossed by a transversal.

parallel lines x and y are cut by transversal w. on line x where it intersects with line w, 4 angles are created. labeled clockwise, from uppercase left, the angles are: 2, 4, 3, 1. on line y where it intersects with line w, 4 angles are created. labeled clockwise, from uppercase left, the angles are: 6, 8, 7, 5. if mangle6 = 123.5°, then mangle1 is

56.5°.
67.5°.
123.5°.
136.5°.