Online project management system

Create a React Native application that implements an online project management system.
Application should run properly on an Android or iOS Simulator/Emulator or device.
Users can create a project and assign members to that project using members email addresses.
The user that creates the project is the leader/manager of that project and has all the rights/permissions to create the following:

1-Project tasks (task id, task name, task description, task start date, task end date)

2-Assign members to created tasks (every member can be paid a different hourly rate, so please assign this as well).

3-Assigned members can check when the task is complete. In this case, application records the date and time of completion.

4-Members should also enter the hours they worked in this task.

5-Some tasks can have prerequisite tasks which means they cannot start before another task is completed. Make sure to consider this.

6-When all the tasks in a project are complete, application should mark the project as complete and record total number of hours members worked on it and the cost of the whole project.