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:

Innovations I’m not 100% sure but I do think that’s is right
Yes, many in the Rocky Mountains and Southern and Northern California
Ridges, Ridges are elevated boundaries that divide watersheds