2. Here is an Activity on Arrow (AOA) network diagram for a project. The lettered A through F represents an activity, as shown in the accompanying precedence diagram. A O D B O E F The probabilistic time for each activity is as follows Activity A B C Time Activity 4-5-8 D 3-5-6 E 3-4-5 F Time 4-5-6 2-5-6 3-4-6 What is the expected time and standard deviation of each path?