Solving Moment Problem with Attached Image

[aeubz]

staics help please!

Please help with this problem.. I'm going crazy.

I have attempted the problem and i think my methods are correct. however some algebra mistake is also there i think.

im submitting my work on the thread below

Question: Determine the resultant moment of the two forces about the Oa axis. express the result as a Cartesian vector.

The picture is attached.
Note*: its 80lb that's a bit smudged on the right of the attachment.

 

[aeubz]

here is my work

the book answer is : [26.1i - 15.1j] lb*ft

 

[Kruum]

Isn't it the perpendicular component of F₁ that creates the torque about the Oa axis? Also the $$\hat{k}$$ in $$\vec{m_1}$$ seems to be incorrect anyways.