For my discrete mathematical structures for computer science class.

6. Which of the following is a negation for "Given any real numbers a and b, if a and b are r then a/b is rational." b are rational a. There exist real numbers a and b such that a and b are not rational and a/b is not rationa b. Given any real numbers a and b c. There d. , if a and b are not rational then a/b is not rational. exist real numbers a and b such that a and b are not rational and a/b is rational. Given any real numbers a and b, if a and b are rational then a/b is not rational. e. There exist real numbers a and b such that a and b are rational and a/b is not rational. Given any real numbers a and b, if a and b are not rational then a/b is rational. 7. Which of the following is a negation for "For all real numbers r, there exists a number s such that rs 10." a. There exists a real number r such that for all real nunnbers s, rs 10. b. For all real numbers r, there does not exist a number s such that rs >10. c. There exists real numbers r and s such that rs 10. d. For all real numbers r and s, rs10. e. There exists a real number r and there does not exist a real number s such that rs 10. f. For all real numbers r, there exists a number s such that rs?10. g. There exists a real number r such that there does not exist a real number s with rs # 1