Computing axis forces of a construction

[twoflower]

Hi all, I'm trying to compute the axis forces in the construction I put to attachment. I already have computed the R forces, but I don't know where should I start computing the axis forces from, from which point.

Could please someone give me some advice?

Thank you very much,
best regards.

 

[Pyrrhus]

You could start by applying the node method at the top.

 

[twoflower]

Thank you very much, Cyclovenom!

However, I'm still not able to finish the exercise. Could you please advise me which of the bars are zero-force? (I mean they have a zero axis force).

Thank you in advance.

 

[Pyrrhus]

Which members without doing the problem you think are zero force members?

Where are you stuck? maybe you can show your work and we can see why are you stuck.