Repeated Eigenvalue. Use MATLAB to show that the matrices in Exercises have an eigenvalue...

Repeated Eigenvalue. Use MATLAB to show that the matrices in Exercises have an eigenvalue of algebraic multiplicity two, but geometric multiplicity one. Use the identity tA = λtI + t(A− λI), where λ is the eigenvalue of the matrix A, and the technique of Example 9 to compute the exponential matrix eIA.