b=

Warning: Undefined array key "a1" in C:\xampp\htdocs\book\php\arrays_functions.php on line 18

Warning: Undefined array key "a2" in C:\xampp\htdocs\book\php\arrays_functions.php on line 19

Warning: Undefined array key "a3" in C:\xampp\htdocs\book\php\arrays_functions.php on line 20

Warning: Undefined array key "a4" in C:\xampp\htdocs\book\php\arrays_functions.php on line 21

Warning: Undefined array key "a5" in C:\xampp\htdocs\book\php\arrays_functions.php on line 22

Warning: Undefined array key "b1" in C:\xampp\htdocs\book\php\arrays_functions.php on line 23

Warning: Undefined array key "b2" in C:\xampp\htdocs\book\php\arrays_functions.php on line 24

Warning: Undefined array key "b3" in C:\xampp\htdocs\book\php\arrays_functions.php on line 25

Warning: Undefined array key "b4" in C:\xampp\htdocs\book\php\arrays_functions.php on line 26

Warning: Undefined array key "b5" in C:\xampp\htdocs\book\php\arrays_functions.php on line 27

Fatal error: Uncaught DivisionByZeroError: Division by zero in C:\xampp\htdocs\book\php\arrays_functions.php:39 Stack trace: #0 C:\xampp\htdocs\book\php\arrays_functions.php(59): average2(Array, Array) #1 {main} thrown in C:\xampp\htdocs\book\php\arrays_functions.php on line 39