Given Argument
Premise 1: E ⊃ D
Premise 2: ~D
Conclusion: ~E

On paper, construct an indirect truth table for the given argument. Then explain your results by filling in the following statements.
Assumptions: The premises were assumed to be T or F and the conclusion to be T or F.
Results: Since this Led to/Do not lead to a contradiction, the argument is Valid or Invalid?