Answer: 
GDP contribution is $6.
Explanation: GDP refers to the market value of final goods and services produced withing the national territory of a country.
Using the value added method, we can calculate GDP by summing up the value added at each level of production.


Or
Using the expenditure approach, GDP is the market value of the final good sold to the customer.
GDP = Cost of bread to the engineer = $6
Answer:
They last for a certain period of time
Explanation:
Typically Certificates of Deposit are offered if the set amount is deposited and kept through the stated amount of time. (The length of the CD can be anywhere from 18 months to 3 years [most popular]) When the money is removed short of the stated time period a penalty is taken from the value of the CD.
Answer:
a.) psychiatric research
Explanation:
A research based on psychology is carried out with the sole purpose of analyzing the behavior of an individual or a group of individuals, based on their overall experiences. In this case, the research is also based on analyzing patients to see who is the best fir to participate in a community service project