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1. Modify the ChainHashMap class in accordance with your design for the previous exercise. 2….

1. Modify the ChainHashMap class in accordance with your design for the previous exercise. 2….

1. Modify the ChainHashMap class in accordance with your design for the previous exercise.2. Modify the ProbeHashMap class in accordance with Exercise C-10.36.Exercise C-10.36Describe how to redesign the AbstractHashMap framework to include support for a method, containsKey, as described in Exercise R-10.3.Exercise R-10.3The use of null values in a map is problematic, as there is then no way to differentiate whether a null value returned by the call get(k) represents the legitimate value of an entry (k,null), or designates that key k was not found. The java.util.Map interface includes a boolean method, containsKey(k), that resolves any such ambiguity. Implement such a method for the UnsortedTableMap class.