What is the critical path, duration, and total cost for an all-normal level of project activity?

What is the critical path, duration, and total cost for an all-normal level of project activity?Calculate the crash cost-per-day for all activities (all activities may be partially crashed). It may be quicker to cut and paste the table above into Excel rather than re-type it – you can fill it in using Excel and then re-paste it into this document.Is a 20-day delivery time possible? If so, find the optimal way of getting a 20-day delivery time or as close to that as possible. Be sure to give the crash schedule (which activities are crashed and for how many days). What is the total project cost with this crash schedule?Activity ‘a’ took 10 days to complete instead of 4. It is the end of day 10 and you are asked to work late tonight to plan the optimal way to keep the project as close to the normal schedule as possible. What actions will you recommend to keep the project on a normal schedule (that is, the original end date)? Be sure to give the crash schedule (which activities are crashed and for how many days). What is the total project cost with this crash schedule?Calculate the shortest delivery time possible for the project. Be sure to give the crash schedule (which activities are crashed and for how many days). What is the duration and the total project cost with this shortest delivery time crash schedule?NormalNormalCrashCrashActivityPredecessorTimeCostTimeCosta-4$5,0003$15,000ba7$8,4002$22,000ca,b5$7,5004$12,600da,b8$2,0004$5,000ea,c4$3,600fd9$5,4003$14,000gd6$6,0003$18,000