A project consists of four activities with information as shown in the table. What is the overall standard deviation of the project? 
Definitions:
Quality
The degree of excellence of a product, service, or process, often measured against standards or customer expectations.
Sustainable
The ability of something to be maintained at a certain rate or level without depleting natural resources or causing severe ecological damage.
Earnings Quality
A measure of the reliability of a company’s earnings as an indicator of its financial health and performance.
Accounting Methods
Systems used by a company to keep track of its financial transactions and to prepare financial statements, such as cash basis or accrual basis accounting.
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