Consider the project below. The earliest start time is $0.$ You can assume Basic PERT probabilities.

Task ID

Predecessor

Best Case

Most Likely

Worst Case

$1$

$-$

$9$

$13$

$18$

$2$

$1$

$9$

$11$

$17$

$3$

$1$

$9$

$13$

$19$

$4$

$2$

$9$

$16$

$25$

$5$

$2$

$11$

$14$

$21$

$6$

$3,4,5$

$8$

$11$

$14$

$7$

$6$

$14$

$20$

$25$

What is the expected completion time of the project to the nearest integer in days?