The network shown below represents a section of work being undertaken by a subcontractor. The subcontractor's labor requirements are shown on Table $1.$

Because this work has to phase in with the work of the main contractor this section must be completed within $27$ weeks. Nevertheless, the subcontractor wishes to carry out some resource smoothing in order that there are no excessive "peaks" on "troughs" in labor profile chart. Prepare two labor profile charts, one based on all activities starting as early as possible and one based on all activities starting as late as possible.

By inspection indicate on one of these charts which adjustments you would make in order to meet the subcontractor's wishes.

Network for Subcontractor's operations $-$ Duration in weeks alongside each arrow.

Table $1-$ Subcontractor's labor requirements

$\backslash$table$[[$Activity$,\backslash$table$[[$Labour required in$],[$numbers of men$]]],[1-2,2],[2-3,3],[2-5,4],[2-4,4],[3-4,3],[3-7,4],[5-6,2],[6-7,2],[4-7,1]]$