Exercise on subroutine

hi there,
It reads:
write a subroutine named greet, that welcomes the person you name by telling them the name of the last person it greets.

like; greet('fred');

This sequence of statement should print:
Hi Fred! you are the first one here!
Hi Barney i've seen Fred
Hi Wilma i;ve seen Fred Barney
HI Betty ive seen Fred Barney Wilma.

I have folloed the tips and even implemented defined operator and state bu…

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