Which of the following arguments are invalid and which are valid? Prove your answer by replacing each proposition with a variable to obtain the form of the argument. Then prove that the form is valid or invalid. The patient has high blood pressure or diabetes or both. 9(a) The patient has diabetes or Parkinson disease or both. .:. The patient has high blood pressure or high cholesterol. They participate in the test or they failed the test or both. 9(b) They passed the test. 1 .:. They participate in the test.