1. What are the three factor categories belonging to McCall's factor model? 2. What factors are included in each of the categories? 3. What differentiates the Evans and Marciniak model from the Deutsch and Willis model? 4. Southcottage Inc. is a manufacturer of washing machines and dishwashers. The requirements document for the new control unit included the following specifications: The firmware should be suitable for all six variations of model 2002 washing machines. The water level control module of the washing machine should be suitable for use as a water level control module in the new model 2002 dishwasher. a. To which of the factors do the above requirements belong? b. Explain your