Deon does a weekly exercise program consisting of cardiovascular work and weight training. Each week, he exercises for at least 12 hours. He spends at most 10 hours doing cardiovascular work. He spends at most 6 hours on weight training. Let x denote the time (in hours) that Deon spends doing cardiovascular work. Let y denote the time (in hours) that he spends on weight training. Shade the region corresponding to all values of x and y that satisfy these requirements