Suppose that you have to schedule and coordinate the various activities for a custom app project. The project can be subdivided into the following ten activities.

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$Predecessor$]],\backslash$table$[[$Expected Activity$],[$Time $($days$)]]],[$A$,-,6],[$B$,-,4],[$C$,$A$,9],[$D$,$A$,4],[$E$,$A$,13],[$F$,$C$,3],[$G$,$C$,$ D$,5],[$H$,$B$,$ E$,6],[$I$,$H$,3],[$J$,$F$,$ G$,$ I,$7]]$

You can see the project network below. After detailed analysis of the project, you found the expected activity times $($in days$)$ for all ten activities. These numbers are incorporated into the project network.

Use the given information to answer to the following questions.