A =

   0.25000   0.35000   0.15000
   0.20000   0.20000   0.25000
   0.15000   0.20000   0.25000

b =

   0.60000
   0.90000
   0.70000

Part a)

cond_inf_A =  30.000

Part b)

x =

   4.0000
  -2.0000
   2.0000


Part c)

deltaA =

   0.010000   0.000000   0.000000
   0.000000   0.000000  -0.010000
   0.000000  -0.010000   0.000000

deltab =

   0.010000
   0.020000
  -0.030000

xtilde =

   6.0313
  -3.4632
   1.6933

relative_change_in_A =  0.013333
relative_change_in_b =  0.033333
relative_change_in_x =  0.50782
bound_on_change_in_x =  2.3333

Part d)

deltaA =

   0.000000  -0.010000   0.010000
  -0.010000   0.010000   0.000000
   0.010000   0.000000   0.010000

deltab =

   0.020000
   0.010000
  -0.010000

xtilde =

   9.6915
  -5.8696
   1.2049

relative_change_in_A =  0.026667
relative_change_in_b =  0.022222
relative_change_in_x =  1.4229
bound_on_change_in_x =  7.3333