The marketing department is deciding which classes to offer over the summer. the classes under consideration are: courseintroduction to marketing retail marketing management marketing high technology business logistics international marketing marketing researchtyperequired elective required elective elective requiredthey are using an optimization model to determine which classes to offer. they have already formulated the objective function and need your with the constraints. a) define binary decision variables to use to make the following constraints. b) they would like to offer exactly 4 classes. c) they want to offer at least one required classes. d) they want to offer at most two electives. e) the same professor teaches both retail marketing management and marketing high technology, so they can