Read the passage and answer the question.Vicarious Liability is a legal principle where one person is held liable for the tort committed by another. This typically occurs in a "Master-Servant" relationship. For the Master to be held liable, two conditions must be met: (1) There must be a formal master-servant relationship, and (2) The tortious act must be committed by the servant "in the course of employment."An act is considered within the "course of employment" if it is either a wrongful act authorised by the master, or a wrongful and unauthorised mode of doing some act authorised by the master. However, if a servant performs an act that is totally unconnected to their job (a "frolic of their own"), the master is not liable. Furthermore, an independent contractor is different from a servant; a master is generally not liable for the torts of an independent contractor because the master lacks the right to control how the work is done.A school hires a private bus company to transport students. The bus driver, employed by the bus company, drives negligently and injures a student. Who is vicariously liable?