Need help with this step! How do I start it? I am kind of lost. Thank you!

Use Case Description: ABC Supply Company needs to keep track of their office and computer inventory in order to reduce costs, manage reorder points, and better track item locations within their facilities. They need to track which buildings contain what products and be able to contact the manager of each building to verify inventory and reorder products, when necessary. The New Technology Center (NTC) is a building managed by Ingrid B. Johnson, while the Candice Simms Foundation (CSF) Building is managed by Mary B. Carter. Both managers have access to the central building phone number Currently, one of the administrative assistants keeps track of office furniture, computers, servers, printers, scanners, printer toner, etc. using a simple spreadsheet. It looks something like this, with just a sample of five of the items tracked: Building Room Number(s) 325, 100 Item Item Number Name 231134-678 HP Deskjet 895Cse 342245-225 HP Toner Vendor ID 555 Item Quantity on Hand item Quantity on Order Vendor Name Sam's Supply Store Sam's Supply Store John's Warehouse 325 555 254668-449 DT Scanner 123 456 New Technology Center New Technology Center Candice Simms Foundation Building Candice Simms Foundation Building New Technology Building 254678-449 DT Hard Drive 100 987 Electronic Depot, Inc. 254278-450 DT 400 Cable 100 Electronic Depot, Inc. Step 2: Define the entities, attributes, and relationships and model them. To do so, write the relational schema. Look at the sample records and any data found inside the use case description. Find the possible themes, and then: a. Setup the relational schema all of the attributes listed b. If possible, identify a candidate primary key that uniquely defines each row. c. Create a dependency diagram