What are the three parts of a for loop control?

Name:- Mit (Question-1) Note:- Please type this java code and also need an output for this given Java program.

public static double timesTwo(double num) {    double result = num * 2; }   1)what is the problem? 2) How will fix it?

(PLEASE USE BASIC  JAVA NOT COMPLEX I AM A BEGINNER THANKS) Canadian phone number has the following format: +1 (604) 295- 8959 Area Code= Three digits starting with 2-9Prefix= Three digits starting with 2-9Subscriber= Any four digits 0-9Write a java program, using loops, that asks the user to enter a phone number then if correct print theArea Code, Prefix, and Subscriber numbers. If not correct, print what is wrong. Sample run:Enter a number or -99 to quit: +1 (604) 277-9999The number is correct with area code: 604, prefix 277, and subscriber 9999Enter a number or -99 to quit: 1 (104) 277-0123Country code doesn’t start with + and area code doesn’t start with a 2-9 number.