Discrete math AOA network

Hi, can anyone please help me with this question? Thanks a lot.

Consider $\displaystyle Q_{AB}=8, Q_{AC}=8, Q_{AD}=8, Q_{B\beta}=11, Q_{CH}=6, Q_{DF}=2, Q_{DE}=2, Q_{DG}=2, Q_{EG}=3, Q_{EF}=3, Q_{FH}=6, Q_{GH}=7, Q_{H\beta}=19.$

Which are time taken from one node to another node, $\displaystyle \beta$ is the artificial end node.

Draw the correponding AOA network and introducing dummy arrows where necessary.

Can anyone help me please? I can draw AON network, but not AOA, it is just too confusing when I only got to second arrow. Please help me, thanks a lot.

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Re: Discrete math AOA network

I don't know if this is even remotely close, I have never done anything with AOA or AON before, but found some images on google.

Let me know what I did wrong so I can work on fixing it.