2) Can women use a shaver to remove pubic hair?
3) What about hair from her legs and arms?
When removing pubic hair, it is preferable for a woman to pluck out the hair (by using tweezers for example). However, shaving the pubic hair is also permissible. (Ahsanul Fatawa: 8/78)
It is permissible for a woman to shave her legs and arms. Also, read this answer:
Mufti Faizal Riza