New employee

As a human recourse department there are procedures to select a new employee, after selecting the new employee what comes next?? These are 4 questions I need you to answer it. Julia is a new employee in a company what the HR manager role in order to induce the new job for her.
First Q: How can HR manager provide a new employee job orientation?

Second Q: what comes after selection? In this question you need to define the step that come after the selection of the new employee

Third Q: how can the line manager help accommodate a new employee? Define and explain the line manager role such as direct the hr department, introduce socialization, etc.

Fourth Q: what are the responsibilities of HRM towards the new employee? The new employee needs to know the policies of the company, contract, salary,..etc