The production manager at a textile mill, believes that a new machine, producing cloth, is not workingaccording to the company's specifications.The company requires that the cloth should have a mean breaking strength of 57 Kg.A sample of 63 pieces of cloth reveals a sample mean breaking strength of 40.8 Kg and a standard deviation of 2.1 Kg.If the manager wants to make a hypothesis test to her belief, what value of the mean would be used in the null and the alternative hypotheses?