$\backslash$table$[[\backslash$table$[[$Task$],[$ID$]],$Description,Predecessor,$\backslash$table$[[$# of$],[$Days$]]],[$A$,\backslash$table$[[$Stake layout of$],[$fields and buildings$]],$n$/$a$,5],[$B$,\backslash$table$[[$Final Design$],[$Approval$]],$A$,20],[$C$,\backslash$table$[[$Order and delivery$],[$of building and$],[$landscape materials$]],$A$,30],[$D$,\backslash$table$[[$Build bathrooms$],[$and Locker Rooms$]],$B$,$C$,40],[$E$,\backslash$table$[[$Build Concession$],[$Stands$]],$B$,$C$,45],[$F$,$Install parking lot,D$,$E$,15],[$G$,$Install lighting,F$,30],[$H$,\backslash$table$[[$Complete$],[$Landscaping$]],$G$,25],[$I$,$Hire and train staff,E$,15],[$J$,\backslash$table$[[$Stock concession$],[$stands and$],[$bathrooms$/$locker$],[$rooms$]],$E$,$ D$,10],[$K$,\backslash$table$[[$Final approval and$],[$Grand Opening$]],$J$,15]]$

What is the critical path