Please throughly explain how you got your answers.

12. Four workstations are used to develop a particular product. Each workstation is operated by a single worker. The workstations are lined up in a fixed sequential order starting with Workstation A, then moving to Workstation B, then moving to Workstation C, and ending with Workstation D. Workstation A takes 1 minute of processing time, Workstation B takes 3 minutes, Workstation C takes 2 minutes, and Workstation D takes 4 minutes. Please assume that the system starts out empty and base your answers on the production of the first three units. Based on this information, please select the BEST answer fo, the following two questions. 1. Which of the following statements is TRUE? A. 3 units will be produced in the first 18 minutes B. throughput time will equal 13 minutes for the 2nd unit produced C. Work-in-process (WIP) at some point will be waiting to be processed in between Workstations C and D D. both A and B are true E. all of the above is true 2. How long will the 3rd unit be waiting as work-in-process (WIP)? A. 0 minutes B. 2 minutes C. 4 minutes D. 6 minutes E. none of the above