$*6-52.$ Determine the critical path for the project network in Figure $6\mathrm{.}49!.*6-60.$ For each of the following activities, determine the maximum delay in

the starting time relative to its earliest start time that will allow all the

immediately succeeding activities to be scheduled anywhere between their

earliest and latest completion times.

a$.TF=10,FF=10,D=4$

b$.TF=10,FF=5,D=4$

c$.TF=10,FF=0,D=4$

Figure $6\mathrm{.}49$ Project networks for Problem $6-52$