(2) The number of people who like table tennis in Class 6 (1) accounts for 30% of the class;

(3) The number of people who like skipping rope in Class 6 (1) accounts for15% of the whole class;

So the answer is: Class Six (1) likes football, Class Six (1) likes table tennis and Class Six (1) likes skipping rope, accounting for 20% of the class.