Question: Modify the function from Listing 5-11 to make it clear to the caller which file could not be opened. Change the find_element function from Listing

Modify the function from Listing 5-11 to make it clear to the caller which file could not be opened.

Change the find_element function from Listing 5-13 to return the position of the key in a. Dont forget to return an error indication if the key is not found.

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