Show that (8.2) and (8.4) satisfy (8.1). Show that (8.12) satisfies (8.5). Show that (8.20)...

Show that (8.2) and (8.4) satisfy (8.1). Show that (8.12) satisfies (8.5). Show that (8.20) satisfies (8.19). For G satisfying X'XGX'X = X'X show that GX' is a generalized inverse of X satisfying three of the Penrose conditions.