Pizza EATaliano, a pizzeria in Budapest, delivers to residents of Vcsey street, Budapest. Delivery times follow a

Pizza EATaliano, a pizzeria in Budapest, delivers to residents of Vécsey street, Budapest. Delivery times follow a normal distribution with a mean of 30 minutes and a standard deviation of 6 minutes.
a. What is the probability that a delivery will take between 25 and 35 minutes?
b. The service does not charge for the pizza if delivery takes more than 45 minutes. What is the probability of getting a free pizza from a single order?
c. During a national football tournament, a resident plans to order pizza six consecutive evenings. Assume that these delivery times are independent of each other. What is the probability that the resident will get at least one free pizza?
d. Find the shortest range of times that includes 80% of all deliveries from this service.
e. For a single delivery, state in which of the following ranges (expressed in minutes) the delivery time is most likely to lie. 28930, 29931, 30-32, 31-33
f. For a single delivery, state in which of the following ranges (expressed in minutes) the delivery time is least likely to lie. 28930, 29931, 30932, 31933