embedded systems, need help for these 4 questions 2.1 2.2, 2.6, 2.8. thank you

In 16 words or less give definitions of the following terms Embedded Device driver Top down Call graph Data flow graph Successive refinement Dynamic efficiency Static efficiency Real time Define the following acronyms HCI JTAG NRE GPIO LED MMI LCD ADC DAC Explain the differences between specification, requirement, and constraint. In 16 words or less give definitions of the following debugging terms Instrument Intrusiveness Black-box White-box Minimally intrusive Stabilization There is a microcomputer embedded in a vending machine. List three operations the software must perform. What is the difference between a microcomputer and a microcontroller? Consider a system with four modules named A, B, C, and D. Draw the call graph if A, B, C calls A and D, and B calls C. Why can't the four individual modules in this system tested one at a time? List 3 factors that we can use to evaluate the "goodness" of a program. Draw a data flow graph of the thermostat algorithm developed in Exercise 1.27. Draw a data flow graph of the cruise control algorithm developed in Exercise 1.28. Draw a data flow graph of the incremental controller developed in Exercise 1.142. Draw a data flow graph of the stepper motor controller developed in Exercise Consider an MP3 player, which has a memory storage device, an MP3 decoder compressed data into raw form), buttons, an LCD a USB link to a PC, dual DACs output, and stereo headphones. Draw a possible data flow graph for system