For many years the MBA Club at Piedmont Business School has held its Friday afternoon beer blasts at She's Not Here, a local watering hole with a nautical ambiance, run by a retired admiral, Andy Bunch.In the past, the MBA's had always consumed whatever beer Andy had on draught, and Andy always had enough beer available to meet demand.Andy kept careful records, and after examining them decided that the MBA's Friday afternoon beer consumption was normally distributed with mean 40M oz. and standard deviation 10M oz., where M was the number of MBA's drinking that afternoon.

a)Suppose 40 students stop by on a given Friday.What is the probability that their beer consumption is

i)less than 2200 oz.?

ii)between 1200 and 2000 oz.?