Question: The heap-sort algorithm sorts a collection using the heap data structure. Since the heap data structure is used in the implementation of PriorityQueue, you can

The heap-sort algorithm sorts a collection using the heap data structure. Since the heap data structure is used in the implementation of PriorityQueue, you can implement the heap-sort algorithm using PriorityQueue. Do the implementation: public static > List heapSort (List 1st) Notice that this is a pure function. 5. (project) Write a method that converts an infix expression into a postfix expression using the following header: public static String infixToPostfix(String expression) For example, the method should convert the infix expression (1 + 2) + 3 to 1 2 + 3 * and 2 + (1 + 3) to2 1 3 + +

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