Clients/Contacts Acessibility

Clients/Contacts Acessibility

Dear, I use the standard version (25$) for my company. However, I didn't find the right way to give appropriate access in the client/contact part. Example: Julien: Senior Manager Christian: Manager Alexandre: Business Engineer If Christian is the manager of Alexandre. I want Christian to see his contacts but as well the ones from Alexandre. But I don't want Alexandre to see all clients. Julien is the manager of Christian. Then, I want him to see his clients/contacts but as weel those from Christian and Alexandre. How many level can we do? How Can I modify access/hierarchy. Thank you in advance.