can someone solve this use java 1 and don't use csc or array

Write a Java program that displays a shape representing capital letter of N as shown in the examples below. The program should ask the user to enter an integer number size greater than or equal to 4 representing the size of the letter N in terms of number of rows and columns. Appropriate error message should be displayed if the user input for size is invalid. Examples Enter size >=4 : 4 Enter size >=4 : 6 Enter size >=4 : 7 *** ** ** * * * * * * * * * * * * * * * ** * *