Please help me with the following questions

July sales for Melodic Kortholt, Ltd., average p1 = $9,500 with 0'12 = $1,250. August sales average p2 = $7,400 with 022 = $1,425. September sales average p3 = $8,600 with 032 = $1,610. (a) Find the mean and standard deviation oftotal sales for the third quarter. (Round your standard deviation to 4 decimal places.) [m Standard deviation [b) What assumptions are you making? The sales for each month are independent of each other. The sales for each month are dependent on each other. The mean January temperature in Fort Collins, CO, is 37.1 F with a standard deviation of 10.3 F. Express these Fahrenheit parameters in degrees Celsius using the transformation C = (5/9)F - 17.78. (Round your answers to 2 decimal places.) OF .C 37.1 10.3