Use APA as a writing style. Use 1.5 spaces between lines and font 12 size, times roman NO plagiarism and add references. 1:What are PLCs? (0.5 page) 2:How the PLC operates? (1 page) 3:Mention and describe 3 types of PLCs (1 pages) 4:Describe the following 3 applications of PLCs (1 page) a. Glass Industry b. Paper industry c. Cement manufacturing