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Extracted text: Chapter Review and Exerci Programming Challenges r each of the following Programming Challenges, use the modular approach and udocode to design a suitable program to sollve it. Where appropriate, use defensive ogramming techniques. Input a number entered by the user and display "Positive" if it is greater than zero, "Negative" if it is less than zero, and "Zero" if it is equal to zero. 2. Develop a menu-driven program that inputs two numbers and, at the user's option, finds their sum, difference, product, or quotient. 2. Input a number (X) and create a program that allows the user to select find- ing the area (Area) of one of the following: • The area of a square with side X, Area = X * X %3D • The area of a circle with radius X, Area = 3.14 * XA2 %3D • The area of an equilateral triangle with side X, Area = Sqrt(3)/4 * X %3D Note: Because X represents a dimension, we require that X > 0. Be sure to