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Sam Baines4,315 Points
Hi - the first screenshot shows you failing because you do not need to add the (;) semi-colon after the function name 'Warning' as this is already in place in the code. And the second screenshot, the answer is 'arguments' - as in you can pass the function one or more arguments, like in following:
For the third and fourth screenshots - you need to 'return' the variable message i.e. in the space you need to put the return statement followed by the message variable.