In a $28$-day human menstrual cycle,when does ovulation typically occur?

The onset of menstruation in a human female is called:

$A$: Corpus luteum begins to atrophy after a short life of $10$ to $14$ days,if fertilization does not occur.
$R$: Luteolysis may be due to the withdrawal of $LH$ support.

The withdrawal of which hormone causes immediate menstruation?

Arrange the events of the menstrual cycle in the order they occur:
$I.$ Secretion of $FSH$
$II.$ Growth of corpus luteum
$III.$ Growth of follicle and oogenesis
$IV.$ Ovulation
$V.$ Sudden increase in the level of $LH$

The age of puberty in females is: