Harry potter general

[nerona]

No: HPFGUIDX 190764

OK, in book three at the end when Harry, Ron and Hermione find out
the truth about Sirius, I noticed something, Sirius said that while
in Azkaban to avoid the dementors he used to transform himself into
a dog. Since he is Animagus, then when Lupin was transforming to a
werewolf, Wormtail grabs Ron's wand I think, and then transform
himself too into a rat.  How come Sirius was able to change at
Azkaban without a WAND???

My other question is in the Deathly Hallows:  when a member from the
Order of the Phoenix to transport the Dursleys, he says that he will
take them somewhere then Apparate all together to a safe place,
although later.

I don't actually remember the exact scene but it says that he was
worried that maybe you cant apparate without a wand.  Although also
later it is proved after Harry's wand was broken he was still able
to apparate with Hermione.

What do you think happened to Umbridge after the Deathly Hallows??

Nerona