For items 1 to 7, identify the property of operations on integers being illustrated in each mathematical expression. 1) (-12)(1) = -12 2) (11 + 7) + 2 = 11 + (7 + 2) 3) 13 + 1 = 1 + 13 4) 7 (2 + 6) = (7)(2) + (7)(6) 5) 21 + 34 = 55 6) (-117) + 0 = -117 7) 39 + (-39) = 0. Choices: a) closure property b) commutative property c) associative property d) distributive property e) identity property f) inverse property​