Refer to Problem $26$ and Figure $13\mathrm{.}20$

a$.$ For Network $($a$),$ suppose after $7$ weeks, activities A$,$ B$,$ and E have been completed, D is $50$ percent completed, and C is $80$ percent completed. What is the revised early completion date for the project?b$.$ For Network $($b$),$ suppose after $25$ weeks, activities A$,$ B$,$ C$,$ F$,$ E$,$ G$,$ and I have been completed, and D and H are ready to begin in week $26.$ What is the revised early completion date for the project? $32.$ For the following questions refer to

Nicholas, John M$.$; Steyn, Herman. Project Management for Engineering, Business and Technology $($p$.465).$ Taylor and Francis. Kindle Edition.