Answer:
a. If you have asked your co-worker multiple times to put the inventory spreadsheet on the share drive and she has not done it, it may be time to escalate the issue. You could speak with your supervisor or manager and explain the situation, emphasizing the importance of having the spreadsheet available for everyone who needs it. Alternatively, you could offer to help your co-worker with the task, or find a compromise that works for both of you, such as sharing access to the document with specific people.
b. If your co-worker states that she will share the spreadsheet but continues to withhold access, it may be necessary to escalate the issue further. You could speak with your supervisor or manager again and explain that the situation has not been resolved despite your efforts. You may also want to document your requests and your co-worker's responses, in case you need to provide evidence of the problem later on. It is important to remain professional and courteous throughout the process, and to focus on finding a solution that works for everyone involved.