1. Determine if the following sets are subspaces of the complex vector space P3(C). If the set is a subspace, you must use the subspace theorem to prove it. If the set is not a subspace, then you must provide a specific counter-example. (a) The set S = {p(x) = a + bx + bx² + (a+b)x³ | a,b ≤ C}. W = {p(x) = = a + bx + cx² + dx³ | a, b, c € C, d = R}. (b) The set

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