What is the speed of the boat in still water? I. The boat travels at the speed of 4km/h upstream. II. The boat travels at the speed of 6km/h downstream.

• If the data given in Statement I alone are sufficient to answer the question whereas the data given in Statement II alone are not sufficient to answer the question
• if the data given in Statement II alone are sufficient to answer the question whereas the data given in Statement I alone are not sufficient to answer the question
• if the data in either Statement I alone or in statement II alone are sufficient to answer the question
• if the data in both the Statement I and II are not sufficient to answer the question