Which of the following statements describes the process for solving -3x ≥ 18?

1. Divide both sides of the inequality by 18 and flip the symbol.
2. Divide both sides of the inequality by -3 and don't flip the symbol.
3. Divide both sides of the inequality by -3 and flip the symbol.
4. Divide both sides of the inequality by 18 and don't flip the symbol.