The first step number that is not justified and the reason it is not justified:
From the attached image
![<\text{ECF}\cong<p>Step 1: is said to be correct cause all the range are equivalent and parallel</p><p></p><p>Step 2: is said to be correct AECF is a parrelologram because it is a quadilateral with two opposite equal sides</p><p></p><p>Step 3: is correct</p>[tex]\begin{gathered} \Delta BEC\cong\Delta\text{ECF}\ldots\text{..} \\ \text{parallel lines cut by a transverse form congruent alternate interior angle.} \end{gathered}]()
Step 4: is correct
[tex]<\text{BEC}\congStep 5: is correct [tex]<\text{BEC}\cong
Step 6 : is not correct , because corresponding parts of the congruent triangle are not congruent.
Step 7: is correct , because its a rhombus.