Binary Choice Questions (8 points @1 points each) Determine which is the best approach (A or B) for Question 1-5. A. supervised learning B. unsupervised learning 1 Separate customers into different groups based on their purchasing history. 2 Use sales revenue from the last quarter to predict sales revenue in next quarter. 3 Group all staff into different types based on their job performance. 4 Use outstanding balance and age to predict whether customers will default on the loan. 5 Separate credit card transactions into different types based on transaction time and location.