can you please solve it and explain it for me my final is today

Project Crashing The table below lists the activities required to complete a construction project. Also included are activity times (in weeks) and standard deviations (in weeks), precedence requirements, normal costs at expected times, and the cost to expedite by 1 week. Any activity can only be expedited by 1 week maximum. Activities "s" and "t" represent the start and termination (completion) of the project, but they have no time or cost values. (a) Draw the network diagram, labeling all activities and times. What is the expected duration of the project? (b) How much would it cost and which activity(ies) should be expedited to reduce the expected duration of the project to 23 weeks? Solution: Project Crashing The table below lists the activities required to complete a construction project. Also included are activity times (in weeks) and standard deviations (in weeks), precedence requirements, normal costs at expected times, and the cost to expedite by 1 week. Any activity can only be expedited by 1 week maximum. Activities "s" and "t" represent the start and termination (completion) of the project, but they have no time or cost values. (a) Draw the network diagram, labeling all activities and times. What is the expected duration of the project? (b) How much would it cost and which activity(ies) should be expedited to reduce the expected duration of the project to 23 weeks? Solution