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4] Write a function add42(), that takes a fancyArray as argument and adds a new element, 42, at the end of the array. The function also updates the len field. - It is OK to assume that the array does not overflow! To test, print the fancyArray before and after the increment function is called. The output should be similar to this: For more practice [Do not submit for the lab report]: Have the function update the average as well