Course Content Ex49 (Companion page 87) S4 Part B Ex52 (Companion page 88) S4 Part B Ex58 page 54 S4 Part B Ex56 (page 61) S4 Part B Ex53 (pages 70-71) S4 Part B Ex51 (pages 50-61) S4 Part B Ex50 (Companion page 54) S4 Part B
