In the weekly discussion, you are required to answer all of the questions below and reply to a minimum of 2 of your classmates for a total of 3 posts. PLEASE NOTE: Discussions are graded on a PASS/FAIL basis, therefore, you must meet the required minimum of 3 posts in order to receive credit. - How can simple mathematics and influence diagrams be used to help develop predictive analytic models? - What is the newsvendor problem? - How can model validity be assessed