Explanation:

Namaste! Dhanyavaad for your message. In order to change the given sentences into Indirect Speech, we can use reporting verbs like said, exclaimed, asked, etc. Here are the sentences in Indirect Speech:

1. Hari Chand lamented that he had failed.

2. She exclaimed that it was a beautiful picture.

3. We cheered that our team had won the match.

4. She wondered if she could have that dress.

Is there anything else I can help you with?