The Python code first asks the user to input an integer and stores it in the variable z. It then checks if z is less than 0. If it is, it prints a specific error message. Otherwise (if z is grea

Step 1: Analyze the code. The Python code first asks the user to input an integer and stores it in the variable z. It then checks if z is less than 0. If it is, it prints a specific error message. Otherwise (if z is greater than or equal to 0), it prints the number and its double.

Step 2: Answer part 3a. If the number -6 is entered: The input z becomes -6. The condition z < 0 (i.e., $-6 < 0$) is true. The program will execute the print statement inside the if block. The output will be: You must enter a number larger than 0.

Step 3: Answer part 3b. If the number 5 is entered: The input z becomes 5. The condition z < 0 (i.e., $5 < 0$) is false. The program moves to the elif condition z >= 0 (i.e., $5 \geq 0$), which is true. The program will execute the print statement inside the elif block, calculating $z \times 2 = 5 \times 2 = 10$. The output will be: 5 doubled is 10

Step 4: Answer part 3c. The code first asks the user to enter a number. Then, it checks if the entered number is less than 0. If it is, it tells the user to enter a larger number. If the entered number is greater than or equal to 0, it calculates and displays the number doubled.

Here are the completed answers for the boxes:

3a) Write down what is displayed if the number -6 was entered when this program was run. [1] $\boxed{You must enter a number larger than 0.}$

3b) Write down what is displayed if the number 5 was entered when this program was run. [1] $\boxed{5 doubled is 10}$

3c) Explain what this code is doing. [3] Asking the user to enter a number. If the number is less than 0, ask user to enter a bigger number. If the number is greater than or equal to 0, double the number and display the result.

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