Step 1: Understanding Direct and Indirect Speech.
In indirect speech, we report the statement or speech without using quotation marks. Pronouns and verb tenses are also adjusted as per the context.
Step 2: Conversion of Sentence (i).
The sentence “We cannot be quite happy in this life” becomes in indirect speech:
He said that they could not be quite happy in this life. Final Answer:
\[
\boxed{\text{He said that they could not be quite happy in this life.}}
\]