Which of the following would be an appropriate situation to require facilitating group decision making?
a. a mechanical engineer is stuck trying to meet performance criteria for a prototype
b. when strong group commitment is needed to decide methods to reduce project scope
c. expectations are unclear regarding a specific task
d. materials needed to finish a custom kitchen have not been determined
e. dysfunctional conflict between two project team members needs to be resolved

You are the manager of a large crude-oil refinery. as part of the refining process, a certain heat exchanger (operated at high temperatures and with abrasive material flowing through it) must be replaced every year. the replacement and downtime cost in the first year is $165 comma 000. this cost is expected to increase due to inflation at a rate of 7% per year for six years (i.e. until the eoy 7), at which time this particular heat exchanger will no longer be needed. if the company's cost of capital is 15% per year, how much could you afford to spend for a higher quality heat exchanger so that these annual replacement and downtime costs could be eliminated?