Can any body please answer this question

I am bulding College Management app

Created Objects, feild etc..,

Here i need to write trigger with even called after insert

Examtype is a feild(Picklist Datatype) and external and internal are picklist values.

if examtype is equals to external than perticular student's internal and external marks should take and should caluclate percentage . Need to write SOQL query as well.

Please help on this.

This is one of requirement in our office.



Thanks,
Ram