With the following relations:

Producers(pid: integer, pname: string, address: string)

Movies(mid: integer, mname: string, category: string)

Theaters(pid: integer, mid: integer, price: real)

The Theaters relation lists the ticket price of movies from different producers. Write the following queries in SQL:

1. Find the mname of movies for which there is some producer.
2. Find the pname of producers who produce every movie.
3. Find the pname of producers who produce every Action movie.
4. Find the mname of movies produced by Paramount and no other producers (e.g., some movies may be produced by multiple producers).

[IF POSSIBLE CAN YOU DO IT WITHOUT USING "INNER JOIN"]