This question runs in a pre-configured Salesforce environment - no personal connection required.

Fetch all posts by a specific user from the DummyJSON API and calculate the average number of reactions per post.

Examples:

Input: userId = 1 Output: 8 Explanation: User 1 has multiple posts, calculate the average reactions across all their posts Input: userId = 5 Output: 12 Explanation: Different users have different posting patterns and reaction averages
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