Couple-resultants engr statics problem

[megr_ftw]

I need help on the first problem of this worksheet. I cannot figure out what I should include in the moment equation (M=Fd)
advice would be greatly appreciated.

https://moodle.uncc.edu/file.php/19847/Section_002/assn4_002.pdf

 

[megr_ftw]

here is the pdf with problem number 1 on it!

 

[PhanthomJay]

Hint: The forces on the 2 nails are a function of the distance between them.