Create an awk script file, myawkmax4, that will read 4 numbers, determine which number is the largest one, and then display the largest number. Your awk script, myawkmax4, must include a self-defined function with 4 parameters. No awk built-in functions are allowed to be used in your script. Please test your script with at least following testing cases: $ ./myawkmax4 3 1 5 4 The largest number is 5 $ ./myawkmax4 -3 -1 -2 -4 The largest number is -1