Topic 4

• Section 4A
• Practice task 17
• Section 4B
• Practice task 18
• Section 4C
• Practice task 19
• Section 4D
• Practice task 20
• Section 4E
• Practice task 21
• Section 4F
• Practice task 22
• Section 4G
• Practice task 23
• Section 4H
• Practice task 24
• Section 4I
• Practice task 25
• Summary