You were hired as a systems analyst by a small independent publishing firm. This firm has been specialized in paperback books, and now thinking of publishing most of their paperback books online. As a systems analyst, you are expected to help develop a computerized inventory and distribution information system, and lead the whole project. With the new strategic objective, you will also develop a solution that will help the firm convert paperbacks to e-books. In your first month, you are expected to be familiar with the firm and the market including competitors and collaborators across the supply chain. You also need to start communicating with internal and external stakeholders to elicit the requirements. Besides, the firm is planning to open new branches in different states and cities, and renew its website on which books are advertised and sold. You are thinking of implementing an agile methodology (iterative and incremental) to plan, design, and implement the information systems. As a systems analyst, you will determine requirements. Required:
Explain how you will ensure continual user involvement.

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."

Use a while-end loop in a script file to calculate the sum of the first n terms of the series: summation sign on the top n bottom k=1 : )^k * k^2 +5k)/3^k show the script file and the two results of n = 10 and n = 20.

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