Let's start by discussing the methods we will implement in our EmployeeRecords class.

• addProject(employeeId: String, projectName: String): Boolean — This method adds a new project to an employee's list of projects. If the project already exists for that employee, the method returns false. Otherwise, it adds the project and returns true.
• addTask(employeeId: String, projectName: String, task: String): Boolean — This method adds a new task to a specified project for an employee. If the project does not exist for that employee, the method returns false. If the task is added successfully, it returns true.
• getTasks(employeeId: String, projectName: String): List<String>? — This method retrieves all tasks for a specified project of an employee. If the project does not exist for that employee, the method returns null. Otherwise, it returns the list of tasks.

Let's build our EmployeeRecords class step-by-step, ensuring we understand each component clearly.