Based on then information given this writing is :a completely integrated contract.
An integrated contract can be defined a written agreement where two or more parties in a contract agreed that their written contract should contain the whole agreement between the parties.
Based on the given scenario Mako and Nico are involve in integrated contract because the parties agreed their written contract to be a final statement of the terms of the contract.
Inconclusion this writing is :a completely integrated contract.
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