Which of the following is the correct way to define and initialise an array of 4 integers? 1 int a = {25, 30, 40, 5}; 2 int a; a = new int; a = 25; a = 30; a = 40; a = 5; 3 int a; a = new int{25, 30, 40, 5}; 4 int

Which of the following is the correct way to define and initialise an array of 4 integers?

1 int[] a = {25, 30, 40, 5};

2 int[] a;
a = new int[3];
a[0] = 25;
a[1] = 30;
a[2] = 40;
a[3] = 5;

3 int[] a;
a = new int{25, 30, 40, 5};

4 int[] a;
a = new int[4]{25, 30, 40, 5};

5 int[] a;
a = new int[4];
a[0] = 25;
a[1] = 30;
a[2] = 40;
a[3] = 5;