How to share the folder "Tasklist" ?

I will specify: there is a mail box: tsk01.
Users send Tasks in a mail box: tsk01.
heads (Bos1, Bos2, Bos3) should have possibility( in the personal mail):
1. to see in the personal mail box all tasks which have come to Tsk01
2. "Accept", "Decline", "Decline with Options" this tasks..

Any body know how ??