Assume that the traffic to the web site of Smiley's People, Inc., which sells customized T-shirts, follows a normal distribution, with a mean of4.43millionvisitors per day and a standard deviation of850,000visitorsper day.

(b)What is the probability that the web site has 3 million or more visitors in a single day? (Round your answer to four decimal places.)

(c)What is the probability that the web site has between 3 million and 4 million visitors in a single day? (Round your answer to four decimal places.)

(d)Assume that 85% of the time, the Smiley's People web servers can handle the daily web traffic volume without purchasing additional server capacity. What is the minimum amount of web traffic (in millions of visitors per day) that will require Smiley's People to purchase additional server capacity? (Round your answer to two decimal places.)

million visitors per day