SB B1 p. 18 and WB p.14

SB B1 p. 18 ex. 1 question 2

SB B1 p. 18 ex. 1 question 3

SB B1 p. 18 ex. 1 question 4

SB B1 p. 18 ex. 1 question 5

SB B1 p. 18 ex. 2 question 2

SB B1 p. 18 ex. 2 question 4

SB B1 p. 18 ex. 2 question 6

SB B1 p. 18 ex. 2 question 8

SB B1 p. 18 ex. 2 question 10

SB B1 p. 18 ex. 4 question 2