1.Given D = { 2, 5, 8, 9 } and (,,) = " + + > 20" a) Evaluate ,, (,,), determining if it is true or false. Thoroughly justify your answer including showing true/false values of the predicate statement. b) Evaluate ,, (,,), determining if it is true or false. Thoroughly justify your answer including showing true/false values of the predicate statement. c) Evaluate , (,,), determining if it is true or false. Thoroughly justify your answer including showing true/false values of the predicate statement. d) Evaluate , x,y (, , ), determining if it is true or false. Thoroughly justify your answer including showing true/false values of the predicate statement.