Wrinkle in time questions

Hi people this post is a post about "A Wrinkle in time" well questions I have for the book.

1) There is an old lady named Mrs Whatsit that turns into what looks like a man with a lower horse body with wings. Is she now male or female?.....

My guess answer ) I think that..... I actually really have not a clue.

2) The main character's little brother get hypnotysed by a evil man and won't return to normal. Another character named Calvin went with them and was given a pair of magiacl glasses that were only supposed to be used in a emergency. The question of all this is why didn't the glasses work and what were they supposed to do?

My answer) I think the glasses were supposed to be used in a diffrent emergency.

3) In the story so far there is some sort of master mind character that is constintly refered to as IT and only IT not he or she but what I don't get is what is IT?

My guess answer) I gueess IT is like a idol or something in that classification.