In cell B12, find the mean for the wait time at a physician's office without a tracking system using the formula =AVERAGE(B2:B11). In cell B13, find the sample standard deviation for the wait time at a physician's office without a tracking system using the formula =STDEV.S(B2:B11). Enter these values below, rounding to three decimal places. A B C 1 Patient Number Without Tracking With Tracking 2 1 23 32 3 2 68 12 4 3 18 15 5 4 19 19 6 5 30 13 7 6 43 38 8 7 13 10 9 8 24 14 10 9 15 11 11 10 38 14 12 Mean 13 Standard Deviation ... give me the colum for 12 and 13. if the mean is 29.1 give me the standar deviation