<prompt> Translate the following text to SwahiliPOSTAL SERVICE AUTHORITY TO ENTER INTO NEGOTIATED RATE AND SERVICE AGREEMENTS WITH INDIVIDUAL CUSTOMERS OR GROUPS OF CUSTOMERS TO PROVIDE SERVICES  <response>: Usimamizi wa Huduma za Posta wa kuingia katika Mikataba ya Kiwango na Huduma ya Mikataba na Wateja wa Binafsi au Vikundi vya Wateja kwa Huduma za Huduma 