1:15 Done webassign.net AA time left... 2:59:28 12. [-/1 Points] DETAILS ROLFFM8 8.2.033. MY NOTES ASK YOUR TEACHER Professor Craig posted the following summary of test grades. Grade Number of grades 90-100 8 80-89 15 70-79 22 60-69 11 45-59 Estimate the class average. 13. [-/1 Points] DETAILS ROLFFM8 8.2.023. MY NOTES ASK YOUR TEACHER Find the mode(s) of the given set of numbers. (See Example 11. Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) 2, 5, 8 , 2, 5 , 8 , 2 , 5 , 8 , 2 , 5 14. [-/2 Points] DETAILS ROLFFM8 8.3.013. MY NOTES ASK YOUR TEACHER Find the sample mean and standard deviation of the following student summer wages. (Round your answers to three decimal places.) Wage (per hour) Frequency 7.25 8 8.00 14 8.60 Co 9.10 mean standard deviation 15. [-/2 Points] DETAILS ROLFFM8 8.3.024. MY NOTES ASK YOUR TEACHER Find the five-point summary of the following scores: 52, 56, 57, 60, 65, 67, 71, 76, 80, 81, 86. minimum Q1 median Q3 maximum Submit Assignment Save Assignment Progress Home My Assignments +Request Extension &lt