The ADT Set stores elements in any order without duplications. It has the following two methods: empty() - to create an empty Set insert(k) - to insert the element k in the set. Suggest an implementation for this ADT, and give pseudo-code for the two methods above.

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Merge sort

Merge Sort recursively sorts a given collection of numbers or elements by using the divide and conquer strategy in less time. It is one of the most used algorithms, with the worst-case time complexity of O (n log n). It was invented by John Von Neumann. The algorithm continuously divides an array into sub-arrays until each sub-array consists of a single element. It then merges those sub-arrays to produce a sorted array.