A project manager is managing a research project. Typically, research projects are not clearly defined and involve a lot of uncertainty. The project has four phases in which a phase can only start when its previous phase is complete. What project lifecycle and phase-to-phase relationship should the project manager use for this project?

Predictive lifecycle with sequential phase to phase relationship Iterative lifecycle with sequential phase to phase relationship Predictive lifecycle with overlapping phase to phase relationship Iterative lifecycle with overlapping phase to phase relationship