How do I set privileges for a certain User with a parictular Role

How do I set privileges for a certain User with a parictular Role

Hello!

I have a User with a role called Sales(Säljare). This role is allowed to read all Activities and Contact Persons but should be allowed to administer all of these related to an account that is owned by that role. The problem is that when I set the Sharing Settings in https://crm.zoho.com/crm/ShowSetup.do?tab=usersPermi&subTab=SharingSetting there are only three types of Private, Read and Full access( create/update/delete ).

How do I set that the particular role is allowed to create/update/delete Activities, Contact Persons and so on Accounts
that are owned by them?