A question is given, followed by two statements. Identify which of the statements is/are sufficient to answer the question.
Question:
Among five objects, V, W, X, Y and Z, V weighs as much as X. Which object is the second heaviest among all?
Statements:
I. Y is twice as heavy as W. W is 1.5 times as heavy as Z. W and Z together weigh as much as V and X together.
II. Y is twice as heavy as Z. Both Y and W together weigh as much as X and Z together.