15 Chapter 27, Eigenvalues and eigenvectors. Exercises page 267

15.1 problem 27.1 (ii)
15.2 problem 27.1 (iii)
15.3 problem 27.1 (iv)
15.4 problem 27.1 (v)
15.5 problem 27.1 (vi)
15.6 problem 27.1 (vii)
15.7 problem 27.1 (viii)
15.8 problem 27.1 (ix)
15.9 problem 27.1 (x)