Assume the following is an actual progress report of Project XYZ 5 months after it began; ACTIVITY ACTIAI ANEN (in $M) Using cost variance analysis, which, if any, of the following is correct about Project XYZ 5 months after it began? a. Activity X has no cost-overrun or cost-under run, Activity Y has cost-under run of $4M, and Activily Z has costoverrun of $4M b. Activity X has no cost-overrun or cost-under run, Activity Y has cost-overrun of $5M, and Activity Z has costunder run of $4M c. Activity X has no cost-overrun or cost-under run. Activity Y has cost-under run of $5M, and Activity Z has cost-overrun of $4M d. Not enough information given to answer this question QUESTION 6 In project management, according to tme-cost trade off, attempts to speed up an already lase activify so that it can be completed on time will a. Decrease activity cost b. Not increase or decrease activity cost c. Increase activity cost d. Not enough information given to answer this question QUESTHON 7 If an assembly line is not balanced; a. The problem of blocking will increase inventary-carrying cost b. The problem of work-starving will increase iale time cost C. Assembly ine efficiency will not be 100% di. All of the above statements are correct