The given question is followed by two statements; select the most appropriate option that solves the question.

Capacity of a solution tank A is $70\%$ of the capacity of tank B. How many gallons of solution are in tank A and tank B?

Statements:

1. Tank A is $80\%$ full and tank B is $40\%$ full.
2. Tank A if full contains $14,000$ gallons of solution.

1. Statement I alone is sufficient.
2. Statement II alone is sufficient.
3. Either statement I or II alone is sufficient.
4. Both the statements I and II together are sufficient.