Problem 2: [10 marks] Display pyramid (filename: DisplayPyramid.java) Write a program that prompts the user to enter an integer from 1 to 9 (assume that the user always enters a valid integer) and displays a pyramid, as shown in the following sample run: 7 Enter a number between 1 and 15: 7 1 2 1 2 3 2 1 2 3 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 5 6 5 4 3 2 1 2 3 4 5 6 7 6 5 4 3 2 1 2 3 4 5 6 7