Problem $2\mathrm{.}3$ What is the difference between risk and uncertainty? How can you identify and differentiate between them in the following cases?

a$.$ ABC Grocery and Supermarket Outlets plans to automate its warehouse by installing a computer$-$controlled order$-$packing system and a conveyor system for moving goods from storage to the warehouse shipping area.

b$.$ Starting an automobile by turning the automobile key in the starter switch is based on limiting the system to the following potential failure modes: battery problems, defects in the starting subsystem, defects in the fuel subsystem, defects in the ignition subsystem, engine failure modes, and an act of vandalism that causes the automobile not to start, among the possible failure modes.