* Answer the following questions: Explain what happened to productivity of U.S. firms in the 2007. Identify some of the steps that supervisors can take to improve their department’s productivity. Describe some ways in which supervisors impact safety performance. * Your answers must be written in a short essay format APA Style of Writing, no less than a full page (300 words) per answer in written content. please make sure to add all of the references in a separated page