Role Permissions required to create a LEAD

Hi SugarCRM Team,
I have certain queries regarding SugarCRM API’s.
I have been using version 4_1, for integrating SugarCRM API’s, which is an old version
I wanted to know what are the role Permissions require to create LEAD and cases for a Contact.

Note: I am using a free trial account
Expecting a reply asap.

Thanks and regards,