Plagiarism1-Suppose one of your classmates asks you to proofread a pap

Plagiarism1-Suppose one of your classmates asks you to proofread a paper before he or she submits it for a grade. When reviewing the document you begin to suspect that some portions are plagiarized.How would you approach your classmate about your concerns?What advice could you offer and what tools would you recommend to help that classmate avoid plagiarism?