You are working in a bank. You have collected enough data to determine the average time needed to serve one customer and found that it follows a normal distribution with = 4.78 minutes and = 1.32 minutes. 1. What is the probability that you will serve 10 customers every hour? 2. What is the probability that you will serve more than 15 customers every hour? 3. What is the probability that you will serve between 10 & 15 customers every hour? 4. What is the number of customers you will be 95% confident that you will serve every hour?