DETERMINING OPTIONAL COMMUNICATION CHANNELS.When selecting communication channels, it is essential to consider the most effective method for delivering specific messages. Please suggest the optimal communication channels for the following messages (No.1 to No.4) taking into account the available options (e.g., face-to-face conversation, telephone call, email, memo, letter, report/proposal, face-to-face group meeting, video, teleconferencing, etc.). Please provide a thorough explanation justifying your choices.

1. In your role as a Team Leader, you want to notify twelve fellow employees of a meeting scheduled for four weeks from now.
2. As the Assistant to the Vice President, your task is to explore the feasibility of establishing internship programs in collaboration with several nearby colleges and universities.
3. You are required to send price quotes for various products in response to a request from a potential customer in London.
4. As a Manager, it is necessary to communicate to an employee that her ongoing anti-social behaviour is jeopardizing her job.