B. 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? C. You are thinking about signing a contract, as a supplier for one of the biggest global exporting company. The draft contract obligates you to deliver 20 tons of orange every week. The delivery process of orange during this season follows a normal distribution with a = 22.5 tons every week and = 3.2 tons. 1. What is the probability that you will achieve the contract terms? 2. What is the orange quantity that you will be 95% confident that you will deliver every week? Question 3 (15 marks) A customer survey was conducted to evaluate consumer satisfaction for 3 products. Use the Customer Survey Sheet provided to perform the following tasks: A. Check if customer satisfaction of Product A is less than 3. B. Check if there is a significant difference between Product A & Product B customer satisfaction. C. Check if there is a significant difference between Product B & Product C customer satisfaction