The strain at point $A$ on the bracket has components $lo{n}_x=400({10}^{-6}),$

$lo{n}_y=540({10}^{-6}),{}_{xy}=-650({10}^{-6}),lo{n}_z=0.($Figure $1)$

Part A

Determine the principal strains at $A$ in the $x-y$ plane.

Enter your answers using three significant figures separated by a comma.

$lo{n}_1,lo{n}_2=$

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Part B

Determine the maximum shear strain in the $x-y$ plane.

Express your answer using three significant figures.

${}_{tn\text{m}\text{a}\text{x}}==$

Part C

Determine the absolute maximum shear strain.

Express your answer using three significant figures.

${}_{abs}=$