[nglwthnati2de]

Hi guys I have to do this sequence diagram. I have done most of it but I am totally lost on the last part. Will somebody please help me with this. i will be forever grateful to you.

The part I still need to do that I am having problems with is this:

a) actor commands system to register identified student (aStudent) for selected class

verify registration rules
if verified - register student
confirm registration
else
display error -
loop back to event 2 to allow student to try again

I have attached diagram that I have put together so far.

Attached image(s)

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