This question runs in a pre-configured Salesforce environment - no personal connection required.
Query all Account records and return a Map where the key is the Account Type (such as "Customer" or "Prospect") and the value is the maximum AnnualRevenue for that Type. Only include Types that have at least one Account with a non-null AnnualRevenue.
Examples:
Input: No parameters
Output: {'Customer' => 225000000, 'Prospect' => 45000000}
Explanation: The highest revenue Customer account has 225M annual revenue, and the highest revenue Prospect has 45M
Input: No parameters
Output: {'Customer' => 185000000}
Explanation: If only Customer accounts have non-null revenue values, only Customer appears in the result
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