Exam 4 problem 1.

The matrix P is given by the equation P=aug(v1,v2,v3) where
D=diag(lambda1,lambda2,lambda3) is the diagonal matrix of given
eigenvalues. They are not augmented together but in parallel, matching
corresponding entries from the eigenpairs (lambda1,v1), (lambda2,v2),
(lambda3,v3). The catch: when you compute the eigenpairs, the ordering
might be different than in D. Use the order in D to label the
eigenvalues, then build P accordingly. Check AP=PD to make sure you got
it right.