How do you create an awk script file, myawkmax, that will read 6 numbers, determine which number is the largest one, and then display the largest number.

- the awk script of myawkmax, must include a self-defined function with 6 parameters.

- No awk built-in functions are allowed to be used in your script.

When test the script with at least following testing cases:

$ ./myawkmax 3 1 2 5 4 6 7

The largest number is 7

$ ./myawkmax -3 -1 -2 -4 -5 -6

The largest number is -1