If an activity whose normal duration is 15 days can be shortened to 10 days for an added cost of $2,000, the crash cost per period is a) $400 b)

If an activity whose normal duration is 15 days can be shortened to 10 days for an added cost of $2,000, the crash cost per period is a) $400 b) $2,000 c) $10,000 d) $20,000 e) $30,000 *bWhich of the following statements regarding PERT analysis is true? a) Each activity has two estimates of its duration. b) Project variance is the sum of all activity variances. c) Project standard deviation is the sum of all critical activity standard deviations. d) Only critical activities contribute to the project variance. e) none of these is true. *dThe Beta distribution is used in project management to a) calculate slack on activities not on the critical path b) calculate the probability that a project will be completed within its budget c)calculate pessimistic and optimistic activity times d) determine which activity should be crashed e) none of these *cThe Beta distribution is used in project management to a) determine which activity should be crashed b) calculate the probability that a project will be completed within its budget c) calculate expected activity times d) calculate slack for activities on the critical path e) none of these *cQuestions are on a practice test leading up to our cummulative final. I want to be 100% prepared for any question I get so I am looking to get all of them answered. (*letter such as *a - is what I think answer is).