Go into your profile and then if you scroll down it has all of your questions. At the end of them there is a small blue "edit". Click it at you can change whatever you want.
Oh and I forgot to say you have to click the one you want to change and then when you go into it it will have the blue edit.
Oh and I forgot to say you have to click the one you want to change and then when you go into it it will have the blue edit.