10 Degrees, heelp

Given the activities whose sequence is described by the following table Activity Immediate Predecessor(s) Time estimates (in days) Optimistic Most likely Pessimistic m b A 3 6 8 B 2 4 4 1 ITU 1 6 2. 7 D 3 8 6 14 E 4 F 10 2. G 4 BD A, E A, E F G H1 H NO-M9N 6 9 1 J 11 16 8 12 20 10 K 2 ) .Determine the e pected corrpletion tirre and variance for each activity Activity Expected completion time, le Variance, Vit) B E H eurs