'Let f: P Where g1: P1 Show that: P B, and f: P2 B, and f: P2 s.t.: B be epimorphisms and P1, P2 projective. f29 = f and 92: P2 P s.t.: f192 = f a) P = Img2+ kref, and P = Img + kref b) P/kerfi P/kerf c) Im(g)/(Im(g) nf) = Im(92)/(Im(92) nf)