The curves in several cases can be fitted with data, but the fitted polynomial can't solve the problem of making volume table. In fact, its change function is a set of sine function and calculus, which is a bit difficult to realize with MATLAB, especially the integration. In addition, I feel that the data of the second question should be divided into three situations, because the title does not give the figures under what circumstances. In short, there are too many situations to consider in this issue.