Exam in june

I have an exam in june, a total of 4 subjects . I need to score 50 in each subject (bare minimum) To pass.

Financial accounting ~ 10% completed

Cost accounting ~ Haven't started yet

Business laws and ethics ~ Haven't started yet

Taxation ~ Haven't started yet

What should I do, I watch lectures on my laptop and make notes what else should I do, I'll start solving pyqs once I complete a subject.