Let's call the overlap amount b for both.
71 = 14 + b + 25
b = 71 - 14 - 25 = 32
To make 80 total we need 7 more.
Answer: put a 32 in the middle, overlap section, 7 in the rectangle outside the circles
check: 14 + 32 + 25 = 71 good
b. We just report the correct section of the diagram,
Answer: 25 French only
c. For Spanish we need the count for the total S circle, so 14 + 32
Answer: 46 in Spanish