$2.$ Look again at the activities outlined in Question $1.$ Assume that before the project starts, your team discovers that the activity duration estimates were all wrong. Rather than $3$ days, Activity $2$ will take only two days to complete, whereas both Activities $4$ and $7$ will take three times longer than originally estimated $($listed in the table$).$ Further, all other activities will take twice as much time $($listed in the table$)$ to complete. In addition, your team has noticed that additional training is needed. This new activity, number $11,$ will take one day to complete, and after the completion of Activities $10.$

a$.$ List all activities with their new durations. $(5$ points$)$

b$.$ Screenshot of the new network diagram $(5$ points$)$

c$.$ Calculate the project duration. $($write down the answer$)(5$ points$)$