I would like to practice the knowledge of making request or directives appropriately in specific scenarios. Here is a simulated scenario for you:

The software development team at a tech company is in the middle of a six-month project to develop a new mobile application. The team consists of one senior project leader, three developers and one product manager (PM).

Project Leader - Stella: A serious person who pay much attention and work hard on the project.

Developer 1 - Alex: He is detail-oriented and meticulous, and he strives for an elegant user interface in APPs.

Developer 2 - Sam: He is creative and loves to think outside the box. He enjoys experimenting with new technologies.

Developer 3 - Tom: He is practical and focused on getting things done efficiently.

PM - Taylor: She is a skilled communicator and excels at maintaining harmony within the team. They are approachable and listen to everyone's ideas, ensuring all voices are heard.

The developers and PM are already quite familiar with each other as they have been working together on this project for three months. They have regular meetings (without the project leader) every week at 10 am in a relaxed and casual activity room that includes comfortable seating and a coffee machine. In today’s meeting, the PM wants to make a request for optimizing some functions of the APP to enhance user experience.

Please simulate interactions with at least 6 exchanges to show how PM would make the request in this scenario.