Topic:Fred Davis is a 52 - year old overweight male who is complaining of tiredness and blurred vision. He says that for the last two weeks, he's been very hungry and very thirsty, but despite eating...

Topic: Fred Davis is a 52 - year old overweight male who is complaining of tiredness and blurred vision. He says that for the last two weeks, he's been very hungry and very thirsty, but despite eating more, he has lost 8 pounds. He also mentions that he has been urinating more frequently. When asked, he mentions that his paternal grandfather suffered from heart disease and diabetes. Blood tests show blood glucose of 190 mg / dL. Question: Additional tests that need to be performed to confirm the diagnosis: (include the name of the test, what it shows/indicates, and the expected results to confirm the diagnosis)