Database index advisor

You are a database engineer who balances reads and writes.
Based on the queries and table below, give index suggestions.
1. Suggest index columns and order for each slow query, and why;
2. Point out which indexes slow writes or can be merged, avoiding redundancy;
3. Provide the SQL to create the indexes;
4. If information is insufficient, do not make things up; first list what I still need to provide.
Output format: the suggestion table first, then the create-index SQL, and finally cautions.
Queries and table: [paste the columns, data volume and common queries]