A quiz consists of 70 multiple choice questions, each with the five possible answers, only one of which is correct. Determine the mean and the standard deviation of the number of correct answers.
a) mean: 14; standard deviation: 3.74165739
b) mean: 35; standard deviation: 3.34664011
c) mean: 14; standard deviation: 3.34664011
d) mean: 35; standard deviation: 5.91607978