activities remaining before the new product can be brought to the market. The project network is as follows:

The activity time estimates $($ in weeks $)$ ?are as follows:

Activity

Optimistic

A

B

C

D

$E$

$F$

G

$H$

I

J

Most Probable

$4\mathrm{.}0$

$3\mathrm{.}5$

$5\mathrm{.}0$

$3\mathrm{.}0$

$10\mathrm{.}0$

$8\mathrm{.}5$

$6\mathrm{.}0$

$6\mathrm{.}0$

$2\mathrm{.}5$

$5\mathrm{.}0$

Pessimistic

$5\mathrm{.}0$

$7\mathrm{.}0$

$6\mathrm{.}0$

$4\mathrm{.}0$

$14\mathrm{.}0$

$12\mathrm{.}5$

$7\mathrm{.}5$

$13\mathrm{.}0$

$6\mathrm{.}0$

$6\mathrm{.}0$ a $.$ ?Develop an activity schedule for this project and identify the critical path activities.

If required, round your answers to two decimal places. Enter $"0"$ ?if your answer is zero.

Activity

Expected Time

Variance. What is the probability that the project will be completed so that Landon Corporation may introduce the new product within $25$ ?weeks? Within $30$ ?weeks?

Expected project completion time $=$

weeks. If required, round your answer to two decimal places.

${?}^2=$

$.$ ?If required, round your answer to two decimal places.

?weeks