An embedded computer is a product that uses a microprocessor as a component. Ie a relationship between a car and its engine. A Microcontroller is a microprocessor that is packaged with RAM, program storage and interface circuitry to make it simple to use
Statement A is true. R4 is not part of the circuit since it has one terminal not connected. The other resistors are in series, so the same current flows through them. Hence they will dissipate equal power.