On mobile web app, where should primary & delete buttons go?

I'm looking at designing a web app for that allows users to view details info of an item and do one of 3 things

• Create another item by "copying" the current one (primary action)
• Edit specific details of the current item
• Delete the current item

Are there conventions as to where primary & delete buttons should be placed on a mobile screen? Which of the following options (or others methods) would be best to handle this?

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