Can someone help me answer these 4 questions using the network diagram for the project. Thank You

1. Assign a crash duration to tasks that you feel are feasible to crash.
2. Assign total normal costs and total crash costs to each task.
3. Decrease your total project duration by 15%. This may be accomplished using any of the techniques described in the lesson.
4. Form a short narrative describing how you arrived at your new durations in (1) above and your basis of estimate for costs in (2).

Building a Playground: 1. Planning the community playground 1.1.Calculate a budget A 1.2. Find / buy land location B 1.3. Obtain Permits C 1.4. Create a playground design / layout D 1.5.Find / buy equipment E 1.6. Find workers F 2. Construction of playground 2.1. Clean the land area G 2.2. Unpack playground equipment H 2.3. Apply safety surfacing I 2.4. Install playground J 2.5. Install benches / picnic tables 3. Completion & Launch 3.1. Add landscaping K 3.2. Final safety inspection of the playground L 3.3. Organize opening date 3.4. Opening Celebration with community M