***I am stuck on question b. I am also going to include the work I did in excel. I am just confused as to why it says decimals. Did I do something wrong?****

Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complet several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completi time, and the pessimistic completion time (all in days) for a new contract are given in the following table: This exercise contains only parts b,c, and d. b) Activities on the critical path for the project are The total project completion time is days. (Round your response to two decimal places.)