QUESTION 4 Which one of the following expressions has the largest value among provided answers? ob-L 1.1? 0 d.?-0.91 QUESTION 5 Which of the following statements about the floor and ceiling functions can be true for some real number x? o a. x -x-0.5121 QUESTION 6 Let R+ denote the set of positive real numbers. Consider the bijection f: R+ ? R+, where for every x ? R*, fx) = 1/X2. What is fl(X)? a- Vy o d.1