ECCO is a company that makes backup alarms for commercial vehicles and heavy-duty equipment like forklifts. The data file ECCO contains warranty claim data as well as the associated manufacturing plant, complaint code, and shift for each alarm that is manufactured.

a. Based on the data provided, what is the probability that a warranty claim comes from a product made in the Salt Lake City plant?

b. What is the probability that a warranty claim was made on the swing shift at the Toronto plant?

c. What is the probability that a warranty claim is for a cracked lens or for a wiring complaint?

d. If two warranty claims are examined, what is the probability that both are from a product made in Boise?