Question 4: GM Co. is planning to add 5 different features to its next year's vehicles. They quantified customer satisfactions for adding each feature and their required costs in the following table. If they add the first feature, they should include 3rd feature too. Feature 1 Feature 2 Feature 3 Feature 4 Feature 5 Cost 10 6 11 8 9 Customer Satisfaction 0.2 0.4 0.5 0.3 0.6 Part a) Formulate this problem as integer programming model to maximize customer satisfaction without exceeding the budget limit of 30