65 year old woman with cough, fever, shaking chills, right pleuritic chest pain

When normal (black) aerated lung abuts soft tissue (such as heart or diaphragm), there is a sharp interface seen on a radiograph. If the lung in a region is not normal (white), it will cause that interface to be obscured. You can use this to identify which lung lobe is abnormal. For this case, identify the structures outlined and decide what they are telling you about which lobe is involved...