Clarify a vague client brief

Here is a project brief I just received:

{{brief}}

What I am unsure about (optional): {{my_concerns}}

Do three things:
1. Summarise what the client clearly wants in 2–3 lines.
2. List up to 5 things that are vague, missing, or could go two ways. Number them.
3. Write a polite reply email asking the 5 highest-leverage clarifying questions. Lead with one sentence acknowledging the brief, then a numbered list, then a friendly close. Sign off as {{your_name}}.

Plain English, no jargon, AU spelling.