Draw a network flow diagram, calculate slack for each activity

Foundation

Construction$-$ Walls, Ceiling & Windows

Plumbing

Electric Wiring

Exterior Paint

Insulation

Interior Paint

Bathroom Fittings

Kitchen Fittings

Carpeting

Walk Drives, Patois

Finish

$\backslash$table$[[$SNo$,$Activity,Predecessor,Weeks$],[1,$Foundation,X$,3],[2,$Construction$-$ Walls, Ceiling & Windows,Foundation,$3],[3,$Plumbing,Construction,$2],[4,$Electric Wiring,Construction,$3],[5,$Insulation,$\backslash$table$[[$Plumbing$,$ Electric$],[$Wiring$]],2],[6,$Exterior Paint,Insulation,$2],[7,$Interior Paint,Insulation,$4],[8,$Bathroom Fittings,Interior Paint,$2],[9,$Kitchen,Interior Paint,$2],[10,$Carpeting,Interior Paint,$1],[11,$Inside Clean Up$,\backslash$table$[[],[$Carpeting$]],1],[12,$Walk Drives, Patois,Inside Clean up$,1],[13,$Finish,Walk Drives, Patois,$1]]$