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How many levels are in the ISA 95 description of the Purdue Enterprise Reference Model? 

Write a program that asks the user to enter a sentence. The program should reverse the order of the words in the sentence and display the result. Do not reverse the characters in the words, only the word order. Source Code: def reverse_sentence(          1         ):     words = sentence.       2      ()     reversed_words =          3        [::-1]     return ‘ ‘.join(               4              ) user_input = input(“Enter a sentence: “) result =             5            (user_input) print(“Reversed sentence:”, result)

Write a program that asks the user to enter the radius of a circle and then calculates and displays the area using the formula: Area = π × r² Use 3.14159 for π. Source Code: # Circle Area Calculator radius =       1     (input(“Enter the radius of the circle: “)) pi =        2        area =     3    *       4      **     5    print(f”The area of the circle is: {area:.2f}”)