Last two questions plz tell the way or answer:

Q 75. Find the values of x, y, z if the matrix A- 0 2 y z x y - z x - y z  obeys the law A' A =I

Q 76. Find 1/2(A+A') & 1/2 (A-A') When A=  o a b - a 0 c - b - c o
 

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