B, C. Also literally a quick search yielded these results, roughly half the time to type this out.
The potential difference comes out to be

Given:
σ = 8. 85 × 10-9 c/m2
we know,



given the potential difference between two equipotential surface=5v
E=∆v
∆d=∆v/E


Thus the potential difference is

Learn more about potential difference from here: brainly.com/question/28165869
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First change km/ s into m/s, then use the formula
Lambda = velocity/ frequency
The shades are very different