Plz help me

Through Covax (the United Nations, World Health Organisation, WHO), Jamaica is set to receive 75,000 doses of vaccine on August 24. The process from manufacturing to the vaccines landing in Jamaica has 11 activities. The vaccines have an expiry date and must be used before a certain date as written on the vials (bottles). The table below list the activities, their predecessors and time for the process. TIME IN DAYS IMMEDIATE ACTIVITY b PREDECESSOR a 1 2 1 A B D E F G H 1 J K 2 3 2 4 4 2 4 2 4 3 2 3 4 3 6 7 9 11 3 6 1 3 1 2 2 1 BD A, E AE F G H,1 a) Calculate the expected duration of each activity and place in the table below 5.5 Marks Activity ABCDEFGHIJK Expected Time 3 b) Draw the network Marks c) Develop the activity schedule for the project 1.5 Marks d) What is project completion time 4 Marks e) What is the critical path 4 Marks