Orm Query for this type of situation

Hi,

I am working on CRM project and stuck with REPORTING part.

I have Accounts , Lead , contact, Calls ,Concern modules

account/Lead can have multiple contacts 

contacts have multiple calls and concerns 

calls have different status like Incoming outgoing missed call etc

Question 

I need to create a reporting system

In this I have to give a functionality like so

list of accounts with counts of :

     contacts, total calls,incoming, outgoing etc

 how can list all this count for a given date ranges calls on all accounts 

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