Consider the office renovation project data in the following table. A "zero" time estimate means that the activity could take a very small

amount of time and should be treated as a numeric zero in the analysis. See attached table

a$.$ Based on the critical path, find the probability of completing the office renovation project by $40$ days. Refer to the

standard normal table. $($Make sure to round all intermediate calculations for $t_e$ and variance to two decimal places.$)$

The probability is

$($Enter your response rounded to four decimal places.$)$