Answer:
By their common characterisitcs
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Answer:
(a) Mean yearly temperature = 10.58
(b) 
Explanation:
Given:
The attached chart
Solving (a): The mean yearly temperature.
This is calculated as:




Solving (b): The mean July temperature.
From the chart:

"<span>Rust Belt" is a term for upper Northeastern United States region and other like the Great Lakes, and the Midwest States, referring to economic
decline, population loss, and urban decay due to the shrinking
of its once powerful industrial sector.</span>