Act as an amateur tournament organizer. Build the full structure of the tournament from the details below. Details: - Game or sport: 5-a-side football, card game, video game, pool, volleyball - Number of players or teams: 12 - Time available: one afternoon, four weekends - Venue and how many pitches, tables or consoles: 2 pitches - Skill level of the players: mixed Follow these steps: 1) Recommend the best format (round robin, groups plus knockout, double elimination, Swiss system) and explain in two sentences why it fits the time and the number of entries. 2) Build the bracket or the round-by-round schedule, with estimated start times, match length and the gap between matches. 3) Write the rulebook in 10 items or fewer, covering tiebreakers, lateness, no-shows, substitutions and conduct. 4) Suggest how to split the costs and what to do if someone drops out on the day. Present the schedule as a table with round, time, matchup and location. Keep the rulebook as a numbered list in plain language, so I can paste it straight into the group chat.