(a) (b) (c) 6. The Laurent expansion of f(z) (d) (e) 1 in the domain defined by [2] > 3 is az. z-3 Which of the following is the value of a_4? (a) 9 (b) 27 = (c) -9 ∞ (d) -27 8118

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A: Step 1: Step 2: Step 3: Step 4: