answer thats on their is wrong.

Kelle Carpet and Trim inatnls carpet in commercial offices. Peter Ketle has been very concemed with the arnount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activites and their optimintic compleson time, the moat lkely completion time. and the pessimistic comphation time (all in days) for a new contract are given in the following fabie. This exprcise containi only part a a) Based on the acivinf time nstimaies, the expected times and variance ior each of the activites ate (Rcund your reaponses to two decimal places)