Fill in the missing statements and reasons to complete the following proof
2. 229 + m∠X = 360.
3. 49+ 131 +49 + m<x = 360 substitution property of equality
4. 229+ m<x = 360
5. m<x= 131
6. <X ≅ <Z and <W ≅ <Y Angles with equal measures are congruent
7. WXYZ is a parallelogram.