In each of the following questions, choose the set of figures which follows the given rule.
1.  Choose the set of figures which follows the given rule. Rule: Closed figures become more and more open and open figures become more and more closed. 


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4.  Choose the set of figures which follows the given rule. Rule: Closed figures gradually become open and open figures gradually become closed. 


5.  Choose the set of figures which follows the given rule. Rule: Any figure can be traced by a single unbroken line without retracting. 


6.  Choose the set of figures which follows the given rule. Rule: Closed figures losing their sides and open figures gaining their sides. 

