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?