Draw graphs for self-energy and Vertex functions

[Neitrino]

Could anyone help/advise me please how to draw graphs for self-energy and Vertex functions given in attachments one and two.
In attachment one Sigma is self energy in coordinate space, S - fermion propagator, here I have one question: I was reading something where I found these exppresions, but how it can be that self-energy in attachment one is expressed only in terms of Propagator S(0), it's a just a vacuum bubble, just circle isn't it?

Irealy need someones help.
Thks a lot

 

[Neitrino]

Any feedback please...
Or did I write something wrongly or incompletely?

 

[jtbell]

Not that I'd be able to help with the question, anyway... but I don't see any attachments.

 

[Neitrino]

Graphs

Re-uploading the attachemnts.