The formula for recall is given by (True Positives) / (True Positives + False Negatives). What is the recall for this example?

Which one is the most appropriate use case for artificial intelligence (AI)?
A data analyst creates a term-document matrix for the following sentence: I saw a cat, a dog and another cat.
Assuming they used a binary vectorizer, what is the resulting weight for the word cat?
Which two properties hold true for standardized variables (also known as z-score normalization)? (Choose two.)
After importing a Jupyter notebook and CSV data file into IBM Watson Studio in the IBM Public Cloud project, it is discovered that the notebook code can no longer access the CSV file.
What is the most likely reason for this problem?