Question: Write a fast java code which does not uses the get(index) methods. And runs in O() linear time. It takes a list of integers List

Write a fast java code which does not uses the get(index) methods. And runs in O() linear time. It takes a list of integers List and multiplies the first element with the last. And then does the same with the second and which sums all these multplication to a final sum, ie return sum.

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