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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}”)

Write a program that prompts the user to enter a string. The program should count and display the number of vowels (a, e, i, o, u) that appear in the string, regardless of case. Source Code: def count_vowels(text):     vowels = ”       1      ”     count =      2         for char in text.lower():         if char in         3       :             count += 1     return        4        user_input = input(“Enter a string: “) vowel_count =             5           (user_input) print(“Number of vowels:”, vowel_count)

Write a program that asks the user to enter a password. The password must be at least 8 characters long and contain at least one uppercase letter, one lowercase letter, and one digit. The program should validate the input and display an appropriate message. Source Code: def is_valid_password(password):     has_upper = any(char.isupper() for char in           1          )     has_lower = any(           2             for char in password)     has_digit = any(char.isdigit() for char in password)     return      3     (password) >= 8 and has_upper and has_lower and has_digit def main():     password = input(“Enter a password: “)     if              4              (password):         print(“Password is valid.”)     else:         print(“Invalid password. It must be at least 8 characters long and contain at least one uppercase letter, one lowercase letter, and one digit.”)        5     ()

One-half liter of water is the same volume as 

A controlled experiment comparing two situations has all identical influencing factors except the 

Procedures operate on data items that are separate from the procedures.

A 5 km span is the same as how many meters?