What are the Canadian legal remedies in each of the following issues ?

1- Family Leave -- when employer stops an employee to leave for helping his family and terminates his employment because of his absence at work place

2- Discrimination-- employer does not give equal opportunity to a person who has applied for a job as gives to another one.

3- Bullying or discrimination -- employer does not react when one employee bullies or discriminate the other one.

4- Unfair Termination of Employment-- employer gives a job termination letter without any previous information to employee.

(specify the references)