Lena does a weekly exercise program consisting of cardiovascular work and weight training. Each week, she exercises for at least 8 hours. She spends at most 5 hours on weight training. She spends at most 11 hours doing cardiovascular work. Let x denote the time (in hours) that Lena spends doing cardiovascular work. Let y denote the time (in hours) that she spends on weight training. Please tell me what points to do to graph and also tell me which region should I shade corresponding to all values of x and y that satisfy these requirements.