Use @RISK to draw a normal distribution with mean 500 and standard deviation 100. Then answer the following questions.  a.  What is the probability that a random number from this distribution is less...

Use @RISK to draw a normal distribution with mean 500 and standard deviation 100. Then answer the following questions.


a.  What is the probability that a random number from this distribution is less than 450?


b.  What is the probability that a random number from this distribution is greater than 650?


c.  What is the probability that a random number from this distribution is between 500 and 700?