can someone please explain how to solve this?

Jack's Floating Banana Party Company is planning to add a new party vessel for the upcoming season. Jack has identified several activities that must be finished before the start of the season. Use the following information: Activity Time Immediate Predecessor(s) Activity (weeks) A 5 none B none A B 4 C.D 10 D Choose the right network diagram for this project. F D E TI F 4 6 2 H F a C 8 0, Choose the right network diagram for this project. A F E O O B A A D O B E O O C F E O O A A B B D B E D F Identify the critical path. Critical path is eTextbook and Media Calculate the expected project length. Expected project length = eTextbook and Media 4 weeks