as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
write three sentences in passive voice.
user
1. the window was opened by him.
2. the house was built by the workers. 
3. the books were returned to the library.
assistant