Final answer:
The operational commander reporting senior will fill in the member's trait average and the summary group average in the fitrep/chiefeval block.
Step-by-step explanation:
In the fitrep/chiefeval block, the operational commander reporting senior will fill in the member's trait average and the summary group average next to the line identifier. This block is used to evaluate and report on the performance and capabilities of military personnel. The trait average represents the individual's overall performance in specific areas, while the summary group average reflects the performance of the group as a whole.