use Java,please include the screenshot of output.

PART-I (Triangle Printing Program) Write four public static methods with the names YourLastName aDoWhile, YourLastName bFor YourLastName_cWhile, and YourLastName_dFor, that display the following patterns separately. Use loops shown in the names to generate the patterns. All asterisks (*) should be printed by a single statement of the form System.out.print (') which causes the asterisks to print side by side. A statement of the form System.out.println) can be used to move to the next line. A statement of the form System.out.print (''); can be used to display a space for the last two patterns. There should be no other output statements in the program. [Hint: The last two patterns require that each line begin with an appropriate number of blank spaces.] s a ok k o PART-II In the main method, use a switch statement that enables the user to pick which method to call to display the pattern