QUESTION $7$

For activities on a project's critical path,

a$.$ earliest start time $($ES$)$ is less than latest start time $($LS$)$

b$.$ earliest start time $($ES$)$ equals latest start time $($LS$)$

c$.$ earliest start time $($ES$)$ equals latest finish time $($LF$)$

d$.$ earliest start time $($ES$)$ is greater than latest start time $($LS$)$

QUESTION $8$

In general, the earliest finish time for an activity is equal to

a$.$ earliest start time $-$ activity time estimate

b$.$ earliest start time $+$ activity time estimate

c$.$ earliest start time $+$ slack time

d$.$ earliest start time $-$ slack time