Question: 3. Data for two matrices X3.1 and Z3.3 are given as: X = matrix(c(2, 6, 1), 3, 1) Z = matrix(c(5, 3, 2, 3, 6,

3. Data for two matrices X3.1 and Z3.3 are given as:

X = matrix(c(2, 6, 1), 3, 1)

Z = matrix(c(5, 3, 2, 3, 6, 1, 2, 1, 9), 3, 3)

a. Show that Z is a symmetric matrix

b. Find inverse of matrix Z.

c. Find determinants of Z and Z inverse. Show that det(Z) is inverse of det(Z-1).

d. Find X'ZX

e. Find Z-1X

e. Find eigenvalues and eigenvectors of Z using R or Excel.

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