Answer 1

https://code.sololearn.com/csnqyx51kz0q/?ref=app

there are just too many things you've done wrong, try the code below and learn from it. also, you should complete the python for begginerrs course.

Answer 2

You need to review Python course, especially the chapters covering input & output technique.

* You try to use variable <g> before you read its value
* You have 'g' inside a string -> " + g ars old" but that was not the correct way to print a variable's value.

Answer 3

g = int(input())
print("you are",str(g),"years old")

String data type cannot be concatenate with int data type .
If You want to use a int as a string typecasting comes into the play.