PROBLEM $-5$

DRAW A PRECEDENCE NETWORK FOR A REINFORCED CONCRETE CULVERT PROJECT FROM THE ACTIVITIES AND DURATIONS LISTED BELOW.

$\backslash$table$[[$ACTIVITIES$,$DURATION $($DAYS$)],[$EXCAVATION$,1],[$REINFORCE BASE,$2],[$SHUTTER BASE,$2$ BEINGS $1$ DAY AFTER REINFORCING BEGINS.$],[$CONCRETE BASE,$1],[$REINFORCE N$.$ WALL,$2],[$SHUTTER N$.$ WALL,$2$ BEINGS $1$ DAY AFTER REINFORCING BEGINS.$],[$CONCRETE N$.$ WALL,$1],[$REINFORCE S$.$ WALL,$1],[$SHUTTER S$.$ WALL,$1],[$CONCRETE S$.$ WALL,$1],[$SCABBLE N$.$ WALL TOP,$1$ FOLLOWS CONCRETING OF RELEVANT WALLS.$],[$SCABBLE S$.$ WALL TOP,$1$ FOLLOWS CONCRETING OF RELEVANT WALLS.$],[$SHUTTER ROOF,$2],[$REINFORCE ROOF,$2$ BEGINS $1$ DAY AFTER SHUTTERING STARTS.$],[$FIX H$.$ D$.$ BOLTS,$1$ BEGINS $1$ DAY AFTER SHUTTERING STARTS.$],[$CONCRETE ROOF SLAB,$1$ FOLLOWS ALL OTHER ACTIVITIES.$]]$