Triangle ABC is a right triangle. Point D is the midpoint of side AB, and point E is the midpoint of side AC. The measure of angle ADE is 36°. (First Figure)
The following flowchart with missing statements and reasons proves that the measure of angle ECB is 54°:
(Second Figure)
Which statement and reason can be used to fill in the numbered blank spaces?

1.Measure of angle AED is 36°
2.Base Angle Theorem
3.Corresponding angles are congruent

1.Measure of angle AED is 54°
2.Base Angle Theorem
3.Alternate interior angles are congruent

1.Measure of angle AED is 54°
2.Triangle Sum Theorem
3.Alternate interior angles are congruent

1.Measure of angle AED is 54°
2.Triangle Sum Theorem
3.Corresponding angles are congruent