This question runs in a pre-configured Salesforce environment - no personal connection required.
Query all Opportunities and calculate the average number of days each Opportunity has existed. Group the results by StageName and return a Map where keys are stage names and values are the average duration in days. For open opportunities (IsClosed = false), calculate days from CreatedDate to today. For closed opportunities (IsClosed = true), calculate days from CreatedDate to CloseDate.
Examples:
Input: No parameters
Output: {'Prospecting' => 45.5, 'Qualification' => 32.3, 'Closed Won' => 15.0}
Explanation: Average days for Prospecting stage is 45.5, Qualification is 32.3, Closed Won is 15.0
Input: No parameters
Output: {'Negotiation' => 22.7}
Explanation: Only one stage exists with average of 22.7 days
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