simple sudocode and in the implementation using java language

Q2. [20 pts] Designing and Implementing an Algorithm - Subsets of a set of n elements a. [8 pts] Write an algorithm that prints all the subsets of three elements of a set of n elements (integers). The input to the algorithm is an array of integers (the elements of the set). The output is a list of all the subsets of three element. (Note that the efficiency of your algorithm will be considered in grading.) b. (5 pts] Identify a basic operation for your algorithm and study the performance of your algorithm by giving its time complexity function. If it has an every-case time complexity, determine it. Otherwise, determine the worst-case time complexity. C. [2 pts] Identify the complexity category to which the algorithm belongs. d. [5 pts] Implement your algorithm using Java. Write a main method that asks the user to enter the size and elements of a set of integers, stores them in an array and then prints all the subsets of three-elements