Anton wants the absolute value of the difference between a student's final mark (x) and the average mark (w) to be greater than or equal to 1 standard deviation (0) That is: IX - #20 Which of the following is correct if the average mark is 65 and standard deviation is 5? [1 mark) a. * S 60 or x = 70 b. * S 60 and x 2 70 c. * 60 and x S 70 d. None of the above