Please I need some help with this project management exercise.

Using the project network below, reduce the project duration from 12 days to 8. For each reduction indicate the compressed activities and adjust the total direct costs. Maximum Normal Normal direct No. Slope compression duration cost HAS 50 3 150 B 100 1 3 100 VS 60 2 4 200 D 60 2 3 200 E 70 1 4 200 F 0 1 150 B D Original duration of the project: 12 3 3 HAS F 3 1x VS E Total direct costs: $1000 4 4