How to calculate these values in biomechanics?

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SUMMARY

The discussion focuses on calculating the forces M and F in a biomechanics problem involving neck muscles supporting a head weighing 30N. The stated values are M=25N and F=45N, but there is a discrepancy as the gravitational force G should equal 30N. Participants suggest that F should actually be 30N, prompting a reevaluation of the calculations for M and G based on the distance between the forces.

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Homework Statement


So there is given that the muscles of the neck support the head and thus exert an M force. The head is 3kg = 30N.

Homework Equations


We got to calculate the M and F forces.

The M force has to be 25 and F 45 . I know this because we got the answers.

The Attempt at a Solution


No idea how those values were calculated, please help
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Photo is bad quality so i don't see details very well. But what i see is that you have certain distance between this forces as well..
 
Also this solutions are not correct for this poor example. You would get G=20N if M=25N and F=45N. On picture is says G=30N.
First of all i think F should be 30N according to nature of problem and the question would be to find forces M and G on muscles if distance between is x,y.
 

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