(example example 2)use a number line to find each sum1 and 3.52. 1.51. 1.5)0 12 3 4 55-4-3-2-1-5-4-3-2-1 0 1 2 3 4 54 2-1 0.50 0.511.5 45. 3 t (-5)-5-4-3-2-1 0 1 2 3 4 57. victor borrowed s21.50 from his mother to go to the theater. a week later, he paid her $21.50 back. how much does he still owe her? (example 3)