Java for beginner: Write a program using a Scanner that asks the user for a number n between 1 and 9 (inclusive). The program prints a triangle with n rows. The first row contains only the square of 1, and it is right-justified. The second row contains the square of 2 followed by the square of 1, and is right justified. Subsequent rows include the squares of 3, 2, and 1, and then 4, 3, 2 and 1, and so forth until n rows are printed. Assuming the user enters 4, the program prints the following triangle to the console 1 4 1 9 4 1 16 9 4 1 Run again? Enter y or n