CHECK: Answer Key
DO: Practice 4-1 (2)
DO: Practice 4-1 (3)
DO: Practice 4-2 (2)
DO: Practice 4-2 (3)
DO: Practice 4-3 (1)
DO: Practice 4-3 (2)
DO: Practice 4-3 (3)
DO: Practice 4-4 (1)
DO: Practice 4-4 (2)
DO: Practice 4-4 (3)