Final answer:
The analysis phase of the SDLC involves tasks like assessing user requirements, developing specifications, and creating data models, not planning.
Step-by-step explanation:
The correct answer to which task is a part of the analysis phase of the SDLC (System Development Life Cycle) is not installation, coding, or testing. These tasks are associated with the implementation and testing phases of the SDLC. Planning, on the other hand, is generally considered part of the preceding phase to analysis. The analysis phase is focused on understanding the system requirements thoroughly and clearly defining the problems that the system aims to solve. Thus, the tasks within the analysis phase include assessing user requirements, developing specifications, and creating data models.