Which of the following is the shortest phase of the cell cycle?

In which stage of meiosis do the two cells have single-stranded chromatids at their equatorial plane?

The energy required to pull each daughter chromosome towards opposite poles at a rate of $1 \mu m/min$ during anaphase is... (in $, ATP$)

$P -$ Statement: Small disc-shaped structures called kinetochores are present on the surface of centromeres.
$Q -$ Statement: Spindle fibers attach to the centromeres of chromosomes.

Which of the following phases is not a part of mitosis?

During metaphase,the spindle fibers attach to the centromere of the chromosomes and align them at the central region of the cell. What is this region called?