(b) The following are the fime estimates for various activities of a project. The lime eslimale are in days. | Aclivily: | $1-2$ | $1-6$ | $2-3$ | $2-4$ | $3-5$ | $4-5$ | $5-8$ | $6-7$ | $7-8$ | | :--- | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | | Least lime: | 3 | 2 | 6 | 2 | 5 | 3 | 1 | 3 | 4 | | Greatest time: | 15 | 14 | 30 | 8 | 17 | 15 | 7 | 27 | 28 | | Most likely lime : | 6 | 5 | 12 | 5 | 11 | 6 | 4 | 9 | 19 |

Explanation

The expected time for each activity is the most likely time. We can use the expected times to estimate the project duration and the critical path.