A letter to my uncle outside the Country asking for financial support and the reason why I need it

How should i study korean, and how many hours should i study it? i am a high school student already learn japanese in class, also i play sports so i tend to not study korean much because i have an excuse, like, ‘i dont know how to properly study for korean’ 감사합니다

Iwant to cancel my subscription to how do i do it?

Which letter represents the atomic number? a) a b) b c) c