Question

Сделка совершена,или совершенна,объясните почему

Answer 1

Совершена - сделана. она произошла
Совершенна - безупречна 
Подходит совершена.

Answer 2

Was the deal completed or not? Explain why.

Based on the available search results, it is not clear whether the deal was completed or not. The snippets provided do not directly address the completion of a specific deal. Therefore, without further context or information, it is not possible to determine whether the deal was completed or not.