Systematic versus Unsystematic Risk $[$LO$3]$ Classify the following events as

mostly systematic or mostly unsystematic. Is the distinction clear in every case?

a$.$ Short$-$term interest rates increase unexpectedly.

b$.$ The interest rate a company pays on its short$-$term debt borrowing is increased

by its bank.

c$.$ Oil prices unexpectedly decline.

d$.$ An oil tanker ruptures, creating a large oil spill.

e$.$ A manufacturer loses a multimillion$-$dollar product liability suit.

f$.$ A Supreme Court decision substantially broadens producer liability for injuries

suffered by product users.