Let A = W* for W = {a, b}, B = {x | x R and x2 + 41x + 41 = 0}, C = {x | x = , m, n Z+, n >4}, D = {x | x R and x2 + 3x + 2 = 0}, and E = {(x, y, z) | x Z, y R+, z Z+}. Identify each set as finite, countable, or uncountable.
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