Which command do you use as a valid way to view the PICs within a router as well as the PICs’ serial numbers?

You can monitor the chassis and obtain chassis information using show chassis argument commands. The following
arguments are some of the most common:
• alarms: This argument displays current chassis alarms;
• environment: This argument displays component and environmental status as well as the operational speeds of
the cooling system;
• hardware: This argument displays an inventory of the installed hardware components along with the serial
number of each component; and
• routing-engine: This argument provides operational status and utilization details for the Routing Engine (RE).