4. (4 point each) Indicate whether the following statements are "TRUE" (T) or "FALSE() and justity. a) (T/F) A Use Case is a scenario of interaction that specifies what the system does and how the User reacts to the system. Justify b) (T/F) Adding 25 to 50 cents to the overall system component cost to use a microcontroller with superior resources size, execution speed, available peripherals, etc. ) has only a minor impact on the profit of the system manufacturer Justify c) (T/F) Implementation of the embedded software and circuitry should be started immediately at the beginning of a project to help make sure that delivery dates are met successfully Justify: d) (T/F) Developing software with a "layered" architecture helps to isolate the customer specified behavior from the implementation "platform" or "environment" (hardware, microcontroller, operating system, etc.) Justify