State, whether the following statements are true or false. (i) If a b, then a - c b - c (ii) If a b, then a + c b + c (iii) If a b, then ac bc (iv) If a b, then (v) If a - c b - d; then a + d b + c (vi) If a b, and c 0, then a - c b - c where a, b, c, and d are real numbers c ≠ 0.