Ranking torques about a pivot with forces at 60° and 30° angles

[flynostrich08]

Homework Statement

Rank the magnitude of the torques in the picture below about the marked pivot point from least to greatest
(using <, >, =). The force magnitudes are in terms of F.

a=2F and pointed up b=F and pointed down c=F pointed up and d=2F pointed down to the left with 60 degrees from from the vertical 30 degrees from the line

_______a________c
b d

The Attempt at a Solution

a believe the answer is b<a=c=d or is d, a&c

 

[thecapo]

Where exactly is the pivot point? And do you have distances between the forces?