A High performance Tailoring company "Shawapna" at Mirpur sampled its delivery records (in days) for 8 customers: 11 10 11 6 1 12 a. What was the average delivery period for the tailoring company? Answer in exact fraction, or rounded to at least 4 decimal places b. Determine the variance in the delivery records. Answer in exact fraction, or rounded to at least 4 decimal-places C. Analyzing delivery records for 18 customers from "Jalwa" tailoring company, you found their mean delivery to be 11.53 days with a standard deviation of 4.83 days. Which tailoring company had more variation in their delivery records?