(2.0 points)You recommend aspirin therapy for treatment of p…

(2.0 pоints)Yоu recоmmend аspirin therаpy for treаtment of pain associated with osteoarthritis in a dog. The dog is presented to your clinic 7 days later with a history of vomiting. Endoscopic examination reveals gastrointestinal ulceration. Decreased synthesis of which of the following eicosanoids is most likely responsible for the dog's clinical signs?