A pert project has 45 activities of which 19 are on a critical path. The estimated time for the critacal path is 120 days. The sum of all activities varances is 64, while the sum of variances along the activiies path is 36. The probability that the project will be completed between 108 and 120 is?

1. -2.0
2. .0227
3. .1058
4. .4773
5. .9773