i) Prepare histograms based on EST & LST Schedule.

ii) Which schedule you will prefer & why?

i)

$\begin{aligned} \text { critical path } : B-D-F &=10-30-40-50 \\ \text { critical Activity } : B-D-F \end{aligned}$

$\text Project \ Duration: 11+5+5=21 \ days.$

ii) From histogram As per EST it is found that peak demand of carpenter goes on decreasing which results in smoothening of the carpenters requrement

As per LST

$\sum \ duration \times Resources^2$

= $(7 \times 4^2)+(4 \times 7^2)+(2 \times 8^2)+(2 \times 11^2)+(1 \times 10^2)+(5 \times 8^2)$

= $1098$

As per EST

= $(8 \times 7^2)+(3 \times 6^2)+(3 \times 10^2)+(2 \times 8^2)+(3 \times 6^2)+(2 \times 8^2)+$

= $1054$