$\backslash$table$[[$Table $1.$ Bay Community Hospital,$],[,$Activities required to introduce new diagnostic procedure,,$],[$A$,$Write instructions,$\backslash$table$[[$Duration$],[($weeks$)]],\backslash$table$[[$Immediate$],[$Predecessors$]]],[$B$,$Select operators,$2,-],[$C$,$Train operators,$3,-],[$D$,$Announce new service,$4,$A$,$ B$],[$E$,\backslash$table$[[$Purchase$,$ ship, and receive$],[$equipment$]],8,-],[$F$,\backslash$table$[[$Test new operators on$],[$equipment$]],2,$C$,$ E$]]$

What is the shortest time period in which the project can be completed using the expected times listed in Table $1?$

What is the shortest time in which the project can be completed if extra money is used to reduce the times for certain activities?

What is the lowest cost schedule for this shortest time?