What kinds of production tasks suffered most from the competition created by offshore and immigrant workers and what kinds of tasks benefited?

Please answer the following three questions in order and according to the reading attached:
1. How did the decrease in offshoring and immigration costs, accompanied by the higher
share in jobs contested by offshore and immigrant workers, affect the employment of
native workers within the manufacturing sector?
2. What kinds of production tasks suffered most from the competition created by offshore
and immigrant workers and what kinds of tasks benefited?
3. Does immigration substitute for offshoring?
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