Classify the following events as mostly systematic or mostly un-systematic.Is the distinction clear in every case?

a.Short term interest rates decrease expectantly.

b.The interest rate a company pays on its short term debt borrowing is increased by the bank.

c.Oil prices expectantly decline.

d.An oil tanker runs aground creating a large oil spill.

e.A major manufacturing company loses a multimillion dollar product liability suit.

f.The Supreme Court of Canada decision substantially broadens producer liability for injuries suffered by product users.