$\backslash$table$[[$Duration $($Days$)],[$Activity$,T_o,T_m,T_P,],[$A$,4,6,9,],[$D$,6,10,15,],[$G$,7,11,15,],[$H$,10,20,36,],[$M$,8,10,14,],[$O$,4,5,8,]]$

The critical path has five activities in a CPM network. their durations are tabulated next. Find:

I$)$ The duration of the project with its standard deviation

The probability that the project will be finished by the end of day $65$

The probability that the project will finish before day $60$

The probability that the project will finish on the $62$nd day

The probability that the project will finish at least six days early

The completion date with at least a $95\%$ confidence level