Answer: Z, W, Y, X
Explanation: Mitosis has four stages: prophase, metaphase, anaphase and telophase.
In prophase, there is condensation of the chromosomes which makes them become visible, and the formation of spindles.
Metaphase involves the aligning of the chromosomes with the spindle in the middle of the cell.
Anaphase involves the separation of the chromosomes into two groups that are genetically identical and their movement to the opposite ends of the spindle.
In telophase, there is formation of nuclear membranes around each set of the chromosomes, spreading out of the chromosomes and the breakdown of the spindles.