To design a new app, a project manager has gathered the time information for each activity as shown in the following table: Activity Predecessors Optimistic Most Likely Pessimistic A / 1 4 7 B / 2 6 10 C B 3 3 9 D A 6 13 14 E A, C 4 6 14 F B 6 8 16 G D,E,F 2 5 8 Identify the critical path. How much slack time is associated with each noncritical activity? Suppose you wanted to have 99% confidence in the project finishing on time. How many weeks in total would your project team need to achieve this 99% likelihood?

Please help me answer parts 3. and 4. of this question if not all of them. Thank you

ONLY hANDWRITTEN eXPLNATION PLEASE

The following represents a project with known activity times. All times are in weeks.Activity    ImmediatePredecessor    TimeA    -    4B    -    3C    -    1D    B    2E    A    3F    C, E    5G    D    3H    F    2I    G, H    3J    I    6K    I    4L    J    21)    Create a CPM Network. 2)    What is the total project time? 3)    What activities are on the critical path?4)    Compute the slack time for all non-critical activities. 5)    What is the latest possible start time for activity D?  Please show all work in excel and how you did it, Thank you!