Answer

• The function certainly needs to take an array of integers as one of its parameters, since this is what it operates upon.
• The function must also take the size of the array as a second parameter. We'll explain this better in a moment, but since the function has no other way of knowing the size of its array parameter, we must tell it somehow.
• The function must return an integer as a result. After all, we are adding up an array of integers.

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