urgent answer needed please

PROJECT SCHEDULING (PERT) The estimated activity times for the research project is as indicated in Table 2. Activity Standard deviation (0) - - Activity Immediate Estimate Activity Activity Predecessors Activity Times Expected Variance (months) Time (te) 62 a m b b A 6 7 8 (A) (a) a B 3 3 3 (B) (b) A 4 4 6 6 8 (C) (c) D B 2 2 2 8 (D) (d) E E DF 2 3 3 4 (E) F B 1 1.5 5 (F) (0) G 1.53 4.5 (G) (g) H E, G 12 3 () (b) (a) (b) () (d) ( Eeselelelee (h) Table 2 Calculate: (a) The activity expected time (te) the activity "B" in the given table. (B) = (b) The activity variance (02) the activity "E" in the given table. (Give your answer in exactly 3 decimal places.) (e) = = (c) The activity standard deviation (o) the activity "H" in the given table. (Give your answer in exactly 3 decimal places.) (h) = = (d) Given that the expected duration, Te to complete the project is 18 months and the critical path of the project is Start -A- C - G - H - End. - Calculate the standard deviation of the project (op). (Give your answer in exactly 3 decimal places.) Op = =