please provide formulas & show work thanks

Problem i2 Suppose you are consldeing croshing a project. The project's network dlagram (AON formai) is in the Froblem-2 Data Worksheet, along with the loble ldentifylng the activities and crash costs for oll the tasks 2.1 Calculate the number of days avallable and crash cost per day for each of tip activities 2.2 What are the prolect paths and lengths? What is the crifical path? 2.3 What is the normal cost of the project? 24 Crash the project (shorten the project duration) by three days. Usi the activities for the first. second, and third crashes and the totol crash (additional) cost