Identify the critical path by activities and duration.

Activity          Duration (Wks)       Preceded by

A                     5                               -

B                     6                               -

C                     2                               A, B

D                     1                               C

E                     3                                C

F                     4                                C

G                     5                              D, E, F

Identify the critical path of above given activities and calculate what the elapsed time of the project would be? Determine the numbers of weeks to activity D over run by without affecting the elapsed time of the project?