To formally recognize and approve a project, which of the following should be created and signed by all key stakeholders

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To formally recognize and approve a project, which of the
following should be created and signed by all key stakeholders?
a. Cost budget b. Project charter c. Risk management plan d.
Work breakdown structure
In reviewing a quality control chart, a process is found to be
out of control, meaning that:
a. there are variations in the outputs of this process. b. there
are 7 consecutive data points in an increasing trend.
c. there are equal number of data points above and below the
mean. d. there are no variations in the outputs of this
process.
In the financial analysis of a project, which of the following
actions can lead to increase in NPV?
(1) Increase in the estimated benefits. (2) Decrease in the
estimated costs. (3) Increase in the discount rate.
a. (1) only b. (2) only c. (3) only d. (1) and (2) only