Problem $9-09$

At a local university, the Student Commission on Programming and Entertainment $($SCOPE$)$ is preparing to host its first rock concert of the school year. To successfully produce this rock concert, SCOPE has listed the requisite activities and related information in the following table $($duration estimates measured in days$).$

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$Predecessor$($s$)]],$Optimistic,$\backslash$table$[[$Most$],[$Probable$]],$Pessimistic$],[\backslash$table$[[$A: Negotiate contract with$],[$selected musicians$]],-,8,10,15],[$B: Reserve site,$-,7,8,9],[\backslash$table$[[$C: Manage travel logistics$],[$for music group$]],$A$,5,6,10],[\backslash$table$[[$D: Screen & hire$],[$security personnel$]],$B$,3,3,3],[\backslash$table$[[$E: Arrange advertising$],[$& ticketing$]],B,C,1,5,9],[$F: Hire parking staff,D$,4,7,10],[$G: Arrange concession sales,t$,3,8,10]]$

a$.$ Which project network is correct?