If a graph GGG is planar, which inequality must hold regarding VVV and EEE for V≥3V \geq 3V≥3?
E≤2V−4E \leq 2V - 4E≤2V−4
E≤3V−6E \leq 3V - 6E≤3V−6
E≤V−1E \leq V - 1E≤V−1
E≤V2÷4E \leq V^2 \div 4E≤V2÷4