Two students did some volunteer work over the summer. The number of hours the first student spent volunteering each week is given below: 7,7,5,6,6,9,8,8 The corresponding number of hours the second student volunteered each week is as follows 16, 18, 11, 15, 13, 10, 7, 15, 15, 14 a. Calculate the standard deviation of the number of hours the first student spent volunteering weekly. Show detailed work. (Simplify your answers and round to four decimal places.) Mean number of hours for student 1 = Student 1 Hours Deviation (Hours - mean) (Deviation) 7 7 5 6 9 8 8 Sum of squared deviations = Total number of dara values = Standard deviation for student 1 = v b. Use your calculator to find the standard deviation for student 2. (Simplify your answer and round to four decimal places.) Standard deviation for student 2 - c. Whose distribution has more variation, student 1 or student 20