How do I add 10mm eye relief to a Keplerian telescope with 7X magnification?

[UrbanXrisis]

i am to design a keplerian telescope with 7X magnification, 5mm exit pupil, and at least 10mm eye relief.

I have one lens with focal length 35mm, another with focal length 5mm, giving a visual mag of 7X and the exit puiple is 5mm, but how do I account for the 10mm eye relief?

 

[UrbanXrisis]

basically, the thing I don't understand is how do I calcuate eye relief for an afocal system?