1. By performing the critical path analysis (use a scratch paper), what is the Earliest Finish (EF) of activity K
2. By performing the critical path analysis (use a scratch paper), what is the Latest Finish (LF) of activity L
3. By performing the critical path analysis (use a scratch paper), what is the Latest Finish (LF) of activity M
4. By performing the critical path analysis (use a scratch paper), what is the Latest Finish (LF) of activity A

Section 2 To complete the wing assembly for an experimental aircraft, Scott De Witte has laid out the major steps Fourteen activities are involved. These activities have been labelled A through N in the following table, which also shows immediate predecessors of activities and their Expected time and variance (in hours) based on their optimistic, pessimistic, and most likely times. NB: When computing the expected times and the variances for the different tasks of the project round to 2 decimals/digits. IMMEDIATE MOST ACTIVITY OPTIMISTIC LIKELY PESSIMISTIC PREDECESSORS (b) (m) 6 4 8 B A 2 3 4 C 32 34 36 D 2 4 6 E 8 10 12 F 10 12 14 DE DE 19 20 21 H E 4 6 8 1 B 1 2 3 J F 6 8 10 K HG 4 13 16 L 1 10 13 16 M 9 5 7 CU K N 7 9 11