(a) When
The 4 W's Problem Canvas blocks are Who, What, Where, and Why. "When" is NOT one of the blocks.
The 4 W's stand for Who, What, Where, and Why — used during Problem Scoping to define the problem clearly. Students often confuse "When" as one of the W's; remember, time/timeline is not a block of the Problem Canvas. The source passages are from Chapter 1 but the 4 W's concept is a standard part of the AI Project Cycle curriculum.