Can I have some help in filling this out?

1. AD is parallel to  BC

    AB is parallel to  DC                                                 Definition of a parallelogram

2. Extend segment CB in the direction of B to E                        A line connects any two poins

3. Angle ABE = Angle DAB             A transversal cutting parallel lines form equal alternative ineterior angles

4. Angle CBE = 180                       Definition of a straight angle                           

5. m Angle CBA + m Angle ABE = m Angle CBE         Angle addition postulate

6.   m Angle CBA + m Angle ABE = 180                   Substitution    

7.  Angle CBA is spplemental to angle  ABE       Definition of supplemental angles

8. Angle DAB is supplemental to angle CBA       Substitution

9. Angle BCD = Angle DAB        Opposite angles in a parallelogram are congruent

10. Angle  BCD is supplemental to Angle CBA      Substitution