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(10 marks) Question 5 (20 marks) -2 -1 Given that A = -4 1 2 2 2 a) Find detA. (2 marks) b ) Find

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(10 marks) Question 5 (20 marks) -2 -1 Given that A = -4 1 2 2 2 a) Find detA. (2 marks) b ) Find the corresponding cofactor matrix of A. Show your working clearly. (6 marks) C) Hence, find A-1. (2 marks) d) Hence, solve the following system of linear equations using inverse matrix method. x-y +z= -12 y - 2z = 10 (2) 3x - y + 5z = -34 W (10 marks)

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