Information Sharing and Analysis Centers (ISACs) are member-driven organizations, facilitated by the government, that gather and share information on cybersecurity threats, vulnerabilities, and incidents among their members. Engaging with an ISAC would enable the company to collaborate with others in the industry regarding emerging attacks and security threats.

This solution would address the three issues as follows:
Serving static content via distributed CDNs would reduce the latency for international users by delivering images from the nearest edge location to the user's request.
Creating a read replica of the central database and pulling reports from there would offload the read-intensive workload from the primary database and avoid affecting the inventory data for order placement.
Auto-scaling API servers based on performance would dynamically adjust the number of servers to match the demand and balance the load across them at peak times.

The security analyst acknowledges this alert because it is a false positive. A false positive is an event classification that indicates a benign or normal activity is mistakenly flagged as malicious or suspicious by the SIEM system. A false positive can occur due to misconfigured rules, outdated signatures, or faulty algorithms. A false positive can waste the security analyst's time and resources, so it is important to acknowledge and dismiss it after verifying that it is not a real threat. Verified Reference:
https://www.ibm.com/topics/siem
https://www.microsoft.com/en-us/security/business/security-101/what-is-siem
https://www.splunk.com/en_us/data-insider/what-is-siem.html