Parts a, b and c

Exercise 2. For each of the following English arguments, express the argument in terms of propositional logic and determine whether the argument is valid or invalid: (a) On Tuesday afternoons, we either go to the library or study at home. It is Tuesday afternoon and we are not at the library. Therefore, we must be studying at home. (b) If there are raisins in the cookies at tea, Jordan won't eat them. If Jordan doesn't eat cookies at tea, he gets sad. Jordan is sad. Therefore, there must have been raisins in the cookies at tea. (c) Theoretical computer science is awesome. Theoretical computer science is challenging. Theoretical computer science is awesome and challenging