3. Find all isolated singularities of the following functions, and determine the type of sin- gularity...

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3. Find all isolated singularities of the following functions, and determine the type of sin- gularity (removable, pole of some order, or essential) -where n is a positive integer (a) (2 points) f(2) = |(b) (2 points) f(z) = e+z-1 (c) (2 points) f(2) sin(1 - z) (d) (2 points) f(z) = cot(z) 3. Find all isolated singularities of the following functions, and determine the type of sin- gularity (removable, pole of some order, or essential) -where n is a positive integer (a) (2 points) f(2) = |(b) (2 points) f(z) = e+z-1 (c) (2 points) f(2) sin(1 - z) (d) (2 points) f(z) = cot(z)