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

Query all accounts from the org and group them into three categories based on their employee count: Small (under 100 employees), Medium (100-500 employees), and Large (over 500 employees). Return a Map where the key is the size category string and the value is the count of accounts in that category. If an account has a null NumberOfEmployees field, categorize it as Small.

Examples:

Output: {'Small': 6, 'Medium': 12, 'Large': 12} Explanation: Based on actual org data, 6 accounts have fewer than 100 employees, 12 have 100-500 employees, and 12 have over 500 employees Output: {'Small': 8, 'Medium': 10, 'Large': 12} Explanation: If 2 accounts with null NumberOfEmployees are categorized as Small, the Small count increases to 8
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