please help

You are given the activity information below and the nelivily-on-nede preeetenee diagram for a project at your company. 16 points (-4/error) a) Determine the critical path and its duration. What is your initial estimate for project completion time? Show your work on the next page. b) Fill in the table on the next page to determine the earliest starl (ES) time, the earliest finish (EF) time, the latest start (LS) time, the latest finish (LF) time, and the Slack for each project activity Slacks ES or LFEE. Activity Time (days) Immediate Predecessors 12 A B D ULIC CD 8 Start Tinish B D a) Fill in the table with each path and show your work by ealeulating the time for each path in the table to determine the critical (longest) path(s). Add delete rows in the table as needed. b) Fill in the ES & EF times in the table below working from Start to finish. Then, fill in the LS & LF times working backwards from Finish to Start. After determining the ES, EF, LS, & LF times, ealeulate the Slack time for cach activity using both SlackLSES and Slack DE Note: Both calculations must give you the same answers. Activity ES LS Slack A B G