ANSWER: If you repent sincerely, Allah will forgive you. However, you must see these sins on the day of judgement. Those who are questioned about their sins will be punished but those who are shown their sins only will be pardoned. 

Read more

ANSWER: Of course this is prohibited and cheating.  Prophet salla Allahu Alaihi wa Sallam said a person who cheats is not from among us.

Read more

ANSWER: He must reach the age of puberty or must reach 15 years, whichever comes first.  https://islamqa.info/en/answers/197392/if-any-of-the-signs-of-puberty-appear-in-a-boy-he-becomes-accountable

Read more