can you please help me with this question?

PERT/CPM During the Corona-Quarantine, Emily decides to teach her kids how to bake cookies. She wants to take the opportunity to practice her own PERT/CPM project management skills as well. So, she lists out the activities that are required to bake two batches of cookies including the predecessors (if any) for each activity and the optimistic, most probable, and pessimistic time (in minutes) it takes to complete each activity, especially since she knows that everything can take longer when working with children. Some of the timings are fixed (e.g. baking or cooling times) so you will see that she has the same values for the optimistic, most probable, and pessimistic times. Create a network diagram and an activity schedule in your Excel/Word/PDF file and answer the questions given below the table. Most Immediate Optimistic Probable Pessimistic Activity Description Predecessor time (a) time (m) time (b) Preheat Oven 5 8 11 B Assemble/measure ingredients Mix dough B Shape first batch C Bake first batch AD 8 Cool first batch E 10 Shape second batch C 4 Bake second batch E.G co un - co un & On Cool second batch H 10 10 10 Store Cookies in a jar F.I 2 w a. What is the expected number of minutes it would take for Emily to complete her project? minutes b. The activities with slack are and c. The probability of completing both batches of cookies in 45 minutes is