17.17 The fire department has a number of failures with its oxygen masks and is evaluating the possibility of outsourcing pre- ventive maintenance to the manufacturer. Because of the risk asso- ciated with a failure, the cost of each failure is estimated at $2000. The current maintenance policy (with station employees performing maintenance) has yielded the following history: 2 3 Number of breakdowns Number of years in which breakdowns occurred 4 3 1 5 5 0 This manufacturer will guarantee repairs on any and all failures as part of a service contract. The cost of this service is $5000 per year. a) What is the expected number of breakdowns per year with sta- tion employees performing maintenance? b) What is the cost of the current maintenance policy? c) What is the more economical policy