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Question 38 (2 points) Why is hand-tracing, or manually walking through the execution of a function,helpful? 1) It enforces the "black-box" concept of function design o 2) It makes unit testing unnecessary 3) It guarantees that the function will compile without errors 4) It is an effective way to understand a function's subtle aspects Save Question 39 (2 points) The variable name "perfect" in the function myFun in the code snippet below is used as both a parameter variable and a variable in a nested block within the function. Which statement about this situation is true? def myFun(perfect): perfect 0 return (iperfect 1) (perfect 1) 1) This multiple use of the same variable perfect will not compile because the scopes overlap 2) While this is legal and will compile in Python, it is confusing 3) Because the scopes of these variables do not overlap, there is no problem ved 4) This situation rarely occurs and the compiler always issues a warning