What is the cost of three tables and two chairs?

I. Cost of four chairs is twice the cost of three tables

II. Cost of two tables is equal to cost of one chair i.e. 500?

if the data in statement I alone are sufficient to answer the question, while the data in statement It alone are not sufficient to answer the question.

if the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

if the data either in statement I alone or in statement II alone are sufficient to answer the question.

if the data given in both the statements I and II together are not sufficient to answer the question

if the data in both the statements I and II together are necessary to answer the question.