A project is composed of 6 activities that have durations and precedence requirements shown in the table.Which of these activities is NOT on the critical path? 
Definitions:
Input Device
is a hardware component used to enter data or commands into a computer or other electronic systems.
Hardware Component
A physical piece of a computer or electronic system that contributes to the functionality of the machine.
Mobile Device
A portable computing device such as a smartphone or tablet that has wireless internet capabilities.
Flash Memory
A type of non-volatile storage that can be electronically erased and reprogrammed, used in USB drives and SSDs.
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