The activities required to service a car at Zippy-Lube can be viewed as a mini-project as summarized in the following table. The variability in the time required to perform each activity is due to the different types, sizes, and condition of the cars to be serviced.

Find B and C please.

44/6.25 Points] RAGSMDA9 15.E.015. The activities required to service a car at Zippy-Lube can be viewed as a mini-project as summarized in the following table. The variability in the time required to perform each activity is due to the different types, sizes, and condition of the cars to be serviced. (a) Draw the activity network for this problem. (b) Use PERT to identify the expected time and variance for each activity. (Round your expected times to two decimal places and your variances to four decimal places.) What is the expected time of the critical path? (Round your answer to two decimal places.) What is the variance of the critical path? (Round your answer to four decimal places.)