The function compute Freqs () in Section 3.6 uses a default bag of words constructed directly from the words passed to it in the argument words List. However, it is possible to supply a different bag of words via the bow parameter. When this happens, it may be the case that some words in words List are not found in the bag of words. This causes an error when running the function. Determine which lines of code in compute Freqs () are problematic and update the function to handle this situation. Be sure to test your code.