-1 (X1 2 Q. Consider the linear system -1 1 -1 X2 =-1 has the solution 1 -1 2 X3, ( 1,1,1 )", and then 2) Is Householder transformation of the matrix of the above system positive definite? justify...

Please answer both subparts ASAP.

Extracted text: -1 (X1 2 Q. Consider the linear system -1 1 -1 X2 =-1 has the solution 1 -1 2 X3, ( 1,1,1 )", and then 2) Is Householder transformation of the matrix of the above system positive definite? justify your answer. 3) Is Householder matrix of the above system stable? justify your answer.