SB B1 p 49 ex 4 and 5

p 49 ex 4 question 2

p 49 ex 4 question 4

p 49 ex 4 question 6

p 49 ex 4 question 8

p 49 ex 4 question 10

p 49 ex 4 question 12

p 49 ex 5 question 1

p 49 ex 5 question 3

p 49 ex 5 question 5

p 49 ex 5 question 7