Final answer:
Sparky can use the a. Pert method to determine the project's duration by analyzing task dependencies and identifying potential delays.
Step-by-step explanation:
To determine how long the project is likely to take, Sparky can use the Pert (Program Evaluation and Review Technique) method. This method involves breaking down the project into individual tasks, estimating the time required for each task, and then determining the critical path, which is the sequence of tasks that will determine the project's overall duration. By using Pert, Sparky can analyze the dependencies between tasks and identify any bottlenecks or potential delays in the project.