When deciding which activities to speed up in order to crash a project schedule, two questions must be asked: _________ and __________. a. Which activities have float?; which activity costs the least on a per-day basis to speed up? b. Are my most skilled resources available?; which activities are on the critical path? c. Which activities are on the critical path?; which critical path activity costs the least on a per-day basis to speed up? d. Which activities can I overlap by using time leads and alternative dependencies?; which work packages can I remove to reduce project scope