Based on the image, describe the geometric elements present and any labeled angles or lines.

Geometric Elements:

The image displays two parallel lines, labeled 'a' and 'b'. A transversal line, labeled 'c', intersects these parallel lines.

Four angles are formed by the intersection of the transversal line 'c' with the parallel lines 'a' and 'b'. These angles are numbered 1, 2, 3, and 4.

Angle 1 and Angle 2 are formed by the transversal 'c' and line 'b'.

Angle 3 and Angle 4 are formed by the transversal 'c' and line 'a'.

There is also some text at the top right of the image that appears to be 'W7'.