Consider the following statements about the 'Roaring Forties'

1. They blow uninterrupted in the northern and southern hemispheres

2. They blow with great strength and constancy

3. Their direction is generally from north - west to east in the southern hemisphere

4. Overcast skies, rain and raw weather are generally associated with them

Which of these statements are correct?

I.A.S. (Pre) 2000