write the property used to complete each step in the proof
shown that demonstrates the equivalence
(ab) (c+d) = ((d+ c) b) a.
(ab) (c+d) = a (b (c+d))
a(b(c+d)) = a (b (d+c))
a(b (d+c)) = (b (d+c)) a
(b (d+c)) a = ((d+c) b) a