Question 2 Consider the network described in the table below. Activity Immediate Predecessor(s) Pessimistic Probable Optimistic J 15 10 8 K 9 8 7 L J 10 6 5 M J 3 3 3 KM 9 5 1 Zlo KM 10 7 4 LN 10 8 3 Calculate the expected duration and variance of the critical path. The sum of expected durations is 26.00; the sum of variances is 4.50. O The sum of their expected durations is 28.00; the sum of their variances is 3.50. The sum of their expected durations is 27.00; the sum of their variances is 3.50. The sum of their expected durations is 22.00; the sum of their variances is 3.50. None of the above is correct