Problem $2.(12$pts$)$ Solve problem # $35$ on page $417$ of ch$\mathrm{.}8.$

A$.$ construct Gantt chart$(2$pts$)$;

B$.$ from the text do a$)1\mathrm{.}5$pts ; b$)1\mathrm{.}5$pts ; c$)3$pts; d$)4$pts $($solve in Excel$)$;