In java please

1. Add whatever necessary to fix the following method so that (3) equals 10 public static int f(int n) f return f (n-1) +3; 2. If the following method is called with a value of 73 for n, what is the resulting output? public static void f(int n) f if (n > 0) ( f (n 5) System.out.print (n % 5); 3. In problems 1 3, show the output that will be displayed by the call (123); . public static void f(int n) f if (n!0) t (n 10) System.out.print (n % 10); 2. public static void f(int n) l System.out.print (n % 10); if (n 0) f (n 10) 3. public static void f(int n) ( System.out.print (n % 10); if (n !-0) f in / 10) System.out.print (n % 10); 4. Given the following recursive method: public static int flint num) f if (num0)