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- This problem is related to the central limit theorem and all the steps and formulae are clear but for the last line with a 1-2P(Z>0.9) - how is this arrived at. Attached problem.find the maximum and minimum values of the func- tion on the given interval y=2x2−4x+2, [0,3]If f(z) is analytic with constant modulus show that f(z) is constant u=3x²y+2x²-y³-2y²