Classify each of the following events as a source of systematic or unsystematic risk with explanations:

(i) After the current election, Donald Trump is no more the President of United States of America and Joe Biden is appointed to take over his place.

(ii) Harlie Davidson is convicted of insider trading and is sentenced to 10 years of prison.

(iii) An OPEC embargo raises the world market price of oil.

(iv) A major consumer product, Ribena loses a product liability case due to misleading Vitamin C advertisement.

(v) The Supreme Court rules that no employer can layoff an employee without first giving 30-days notice.