Determine the upward force, Physics

The force applied at A is P30 Newton's, and P31 and P32 are dimensions in mm.  A mechanic uses his left hand to support the wrench at point B. Determine the upward force required at B so that when a force is applied at A, there is no rotation of the wrench about the x-axis.  Then under these conditions, determine the net moment at O about the z-axis.   

The force required at B rounded to the nearest Newton so there is no rotation of the wrench about the x-axis, is  

ANS

The net moment at O about the z-axis rounded to the nearest N.mm when there is no rotation of the wrench about the x axis, is. 

ANS

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