In java please, with 3 methods

Your program should contain three methods: l) a main method which does all input and output (in other words, you don't need a 2) a method called factorial that computes the factorial of a number (you can use either 3) a method called combinations that computes the number of combinations. The separate input method for n and k, just prompt for the values in the main method) for loop or a while loop) combinations method should be a relatively short method (around 5 lines). It simply the factorial function with an appropriate argument when it needs a factorial compute (hint: it will do this three times). Example 1: Enter the number of items to choose (k): 3 Enter the number of items (n) 5 There are 10 combinations