Branding an online grocery store

We are in the process of launching a new project, Online grocery store in one of Cairo's new cities. The source of the trafic and the only platform to be launched at the beginning is a page on Facebook. (With the vision to expand in the future) The responsible person is required to prepare a marketing plan and apply it on Facebook (for two months, and start the page of ten days) begins with the launch of the brand and include 1. Basic objectives and secondary objectives during that period 2. What ideas and tools are needed for the success of these campaigns 3. What content will be provided 4. What is the approximate cost of advertising on Facebook during that period? 5. What is the return on investment (ROI) I do not mean sales, but I mean the return or goal of launching campaigns this period 6. What KPIs will work to ensure the success of the plan 7. How will you build a long-term relationship between the Brand and the target customer? 8. What is the average return of the purchase by the customer? 9. What is your way of knowing the behavior of the target audience? 10. How to plan for the potential buyer's buy-in to buy vegetables 11. What time is the delivery and implementation of that plan? I would like to submit an answer to these questions, although If you worked on a similar project so I wish to develop a case study for the project that I have done by clarifying the previous points. The work will be continuous for those who have proved their efficiency in achieving the vision of the company (And priority to those who exist within Egypt to be informed of the news and recipes of the target market)