Sin for not wearing niqaab

Q: I am a female and I wear abaya and scarf but not the niqaab (face veil). I am trying my best to cover my body properly and have heard that the face veil is waajib, however, my question is, do I get sin if I do not wear the niqaab? I do however wear the appropriate attire besides covering my face.

Including an amount in one's zakaat calculation that one set aside for sadaqah

Q: I made an intention that a certain portion of my annual bonus will be set aside for Sadaqah and Lillah. The money is not in a separate bank account but together with my savings. I have a spreadsheet of the amount what was spent and how much is still available for charity.

Do I need to include the amount into my Zakaat calculation, assuming that I have not discharged it as charity it for a lunar year? The intention is to still discharge the money as Sadaqah or Lillah.

Reciting the Quraan Shareef on a phone while sitting behind a person

Q: If a person is sitting in the masjid in the 3rd or 4th saff with people sitting in front of him and he is sitting at the back of them, can he read Quraan on the mobile. Will it be dishonouring the Quraan as he is sitting at the back of person and reading Quraan on the mobile. It means the Quraan is at the back of a person.

Can one read Quraan in the Haram of Makkah when people are doing tawaaf, or sitting in front of a person, or will it be not correct?

Reading any Islamic book

Q: I have a goal to finish reading all of our Islamic books in the house this Ramadhaan. I'm not sure what the content of my Islamic books are. It is books that I have never opened. They may or may not have Quraanic verses, hadith, etc.

Is it permissible to read Islamic literature during the days of haidh?