Are antipodal cells and synergids haploid or diploid . how?

Embryosac has folllowing cells inside, their ploidies are as: antipodal cells-haploid;synergids-haploid;egg cell-haploid;polar nuclei-haploid. Inside the embryo sac , all the cells (2 synergids , 2 antipodals and the egg cells) are haploid because it has one nucleus but the central cell is diploid because it has two nucleus.