2. The letter sorting job in the Post Office involves four elements. A time study conducted on this job resulted in the observed times and performance ratings shown in the table below: (10 pts.) ELEMENT Performance Observed times (in minutes) Rating % 1 2 3 4 5 6 Collection 95 1.10 1.14 1.08 1.20 1.16 1.26 Categorization 80 0.44 0.50 0.43 0.45 0.48 0.46 by destination Categorization 100 1.50 1.54 1.47 1.51 1.49 1.52 by class Bagging 90 0.84 0.89 0.77 0.83 0.85 0.80 a. Determine the average time for each element. b. Find the normal time for each element. c. If the company uses an allowance factor of 18%, determine the standard time for the entire job. Show all your computations