The schedule data in weeks for a project is shown below. Using the Activity on Node $($AON$)$ approach $($and assuming that the Earliest Start Time for Activity $1$ is ZERO$),$ which of the following answers is correct:

Activity Duration Dependencies

$18$ N$/$A

$2121$

$391$

$4101$

$572$

$682,3$

$783$

$8103,4$

$9124$

$1095,6,7$

$1198,9$

$121210$

$131110$

$141211$

$15612,13,14$