Hi, I just have another question that i am unsure of...and need help

Average loading time of a clothing website is normally distributed with a mean loading time of 'I i s and a standard deviation of 3s. A recent survey revealed that if customers wait more than 17sec they move on to another website. Use this information to answer Question 20. Estimate the probability that they lose customers because of a delay loading the website. Give your answer to 3 decimal places. [2 marks] Answer: Fiftyve percent of the customers who shop online opt for same day delivery. The delivery cost for one customer is 85. However, the delivery company offers a discount of 10% if there are more than 50 deliveries a day. If the website gets 95 customers on a particular day, how many sameday deliveries would you expect, and at what total cost? [2 decimal places) [2 marks] Expected sameday deliveries is Expected delivery cost is S They also offer click and collect service at the store and the items are guaranteed to be ready by 5 days or less. Last month's actual delivery times (X days) were analysed to give the following probability distribution. [2 marks] P(X=x) 0.08 0.06 0.08 0.49 0.05r 0.03 0.02 a. Fill in the blank with the probability that the items ordered will be available in 5 days. b. What is the average time (in days) the order will be ready to collect from the store? (2 decimal places)