Distance between two parallel planes $2x + y + 2z = 8$ and $4x + 2y + 4z + 5 = 0$ is\\ (1) $\frac{7}{2}$\\ (2) $\frac{9}{2}$\\ (3) $\frac{3}{2}$\\ (4) $\frac{5}{2}$