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postgresql - Query to get distribution across weeks for a given start and end dates

I have a table like below by name Tasks.

TaskId StartDate EndDate
Task1 2020-01-01 09:00:00.00 2020-01-15 18:00:00.000
Task2 2020-01-04 09:00:00.00 2020-01-19 18:00:00.000
Task3 2020-01-09 09:00:00.00 2020-01-21 18:00:00.000
Task4 2020-01-12 09:00:00.00 2020-01-21 18:00:00.000
Task5 2020-02-02 09:00:00.00 2020-02-05 18:00:00.000
Task6 2020-01-23 09:00:00.00 2020-01-18 18:00:00.000
Task7 2020-02-05 09:00:00.00 2020-02-24 18:00:00.000

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