A.1) x = 1; 2) ; 3) max y = y(1) = 2; min y = y (2) =
B.x = 2; 2) ; 3) max y = y(1) = 2; min y = y (2) =
C.x = 3; 2) ; 3) max y = y(1) = 2; min y = y (2) =
D.1) x = 4; 2) ; 3) max y = y(1) = 2; min y = y (2) =

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