Question for MOMBASA CUSTOMS OFFICE

Hi
This is shahzad and would like to inform you that i spent here 1.6 years in Mombasa on work permit.
I want to go back to my home country Pakistan as my assignment is finished.
I have a car purchased from Mombasa Kenya for my personal use and would like to take it to my country.

I want to know that how i can take my personal car to Pakistan from Mombasa Kenya and what will be the duty charges and sea freight from Mombasa to Karachi Port?

Regards