Marketing specialists at Sarasota Beer Co. developed a new advertising campaign for summer sales. The ads were particularly aimed at sports events where Sarasota Beer sold kegs of beer on tap. The marketing group worked for months with a top advertising firm on the campaign. Their effort was successful in terms of significantly higher demand for Sarasota's keg beer at sports stadiums. However, the production department had not been notified of the marketing campaign and was not prepared for the increased demand. The company was forced to buy empty kegs at a premium price. It also had to brew some of the lower-priced keg beer in vats that would have been used for higher-priced specialty beer. The result was that Sarasota Beer sold more of the lower-priced keg beer and less of the higher-priced products that summer. Moreover, the company could not initially fill consumer demand for the keg beer, resulting in customer dissatisfaction. Use the open system perspective to explain what has occurred at Sarasota Beer Co.

Write a program that displays the following menu: geometry calculator 1. calculate the area of a circle 2. calculate the area of a rectangle 3. calculate the area of a triangle 4. quit enter your choice (1-4): if the user enters 1, the program should ask for the radius of the circle and then display its area. use the following formula: area = ď€(the square of r) use 3.14159 for ď€ and the radius of the circle for r. if the user enters 2, the program should ask for the length and width of the rectangle and then display the rectangle’s area. use the following formula: area = length * width if the user enters 3, the program should ask for the length of the triangle’s base and its height, and then display its area. use the following formula: area = base * height * .5 if the user enters 4, the program should end. input validation: display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu. do not accept negative values for the circle’s radius, the rectangle’s length or width, or the triangle’s base or height. note: if the user enters an improper menu choice (1-4), the program prints "the valid choices are 1 through 4. run the program again and select one of those." if the user enters a negative radius, the program prints "the radius can not be less than zero." if the user enters a negative value for height or base, the program prints "only enter positive values for base and height."