a. Starting with a context diagram, draw as many nested DFDs as you consider necessary to represent all of the details of the engineering document management system described in the following narrative. You must draw at least a context diagram and a level-0 diagram. In drawing these diagrams, if you discover that the narrative is incomplete, make up rea- sonable explanations to complete the story. Provide these extra explanations along with the diagrams. Projects, Inc. is an engineering firm with approximately 500 engineers that provide mechanical engineering assistance to organi- zations, which requires managing many docu- ments. Projects, Inc. is known for its strong emphasis on change management and quality assurance procedures. The customer provides detailed information when requesting a docu- ment through a web portal. The company liai- son (a position within Projects, Inc.) assigns an engineer to write the first draft of the requested document. Upon completion, two peer engineers review the document to ensure that it is correct and meets the requirements. These reviewers may require changes or may approve the document as is. The original engi- neer updates the document until the reviewers are satisfied with the quality of the document. The document is then sent to the company liaison, who performs a final quality check and ensures that the document meets the require- ments specified by the customer. Finally, the customer liaison sends the document to the customer for approval. The customer can require changes or accept the document. When the customer requires changes, the company liaison assigns an engineer to make the changes to the document. When those changes are made, two other engineers must review them. When those reviewers are satis- fied with the changes, the document is sent back to the company liaison, who sends the document back to the customer. This may hap- pen through several iterations until the cus- tomer is satisfied with the document.